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  • imidazole  (2)
  • preparation  (2)
  • 1,2,3-Diazaphospholes  (1)
  • 1-Metalla-1,3-dien-5-ynes  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Organische Synthesen mit übergangsmetall-Komplexen, 51. 1-Metalla-1,3,5-triene und 1-Metalla-1,3-dien-5-ine von Chrom und Wolfram durch Insertion von Alkinen in M=C- bzw. C=C-Bindungen von 1-Metalla-1,3-dienen bzw. 1-Metalla-1-en-2-inen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1229-1236 
    Details
    ISSN: 0009-2940
    Keywords: Carbene complexes of chromium and tungsten ; 1-Metalla-1,3,5-trienes ; 1-Metalla-1,3-dien-5-ynes ; Insertion of alkynes into M=C and C=C bonds ; [2 + 2] Cycloaddition reactions of carbene complexes and alkynes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organic Syntheses via Transition Metal Complexes, 51. - 1-Metalla-1,3,5-trienes and 1-Metalla-1,3-dien-5-ynes of Chromium and Tungsten by Insertion of Alkynes into M=C and C=C Bonds of 1-Metalla-1,3-dienes and 1-Metalla-1-en-3-ynes, respectively1-Metalla-1,3,5-trienes LnM=C(NEt2)-C(Me)—C(OEt)-CH=CHPh (3,4) and LnM=C(OEt)- CH=C(NEt2) - C(Me)=CHPh [5, LnM=Cr(CO)5 (a), W(CO)5 (b)] are obtained for the first time from the corresponding 1-metalla-1,3-dienes LnM=C(OEt) - CH=CHPh (1a, b) under very mild conditions by the insertion of the electron-rich alkyne Et2N-C ≡ C - Me (2) into the M=C and the C=C bonds, respectively, of 1. The chelate complex (6b) and the cyclobutenyl carbene complex 7b are isolated as minor side products. 1-Metalla-1,3-dien-5-ynes LnM=C(NEt2) - C(Me)=C(OEt) - C ≡ CPh [9, 10, LnM=Cr(CO)5 (a), W(CO)5 (b)] are formed with high regio- and stereoselectivity on insertion of 2 into the M=C bonds of 1-metalla-1-en-3-ynes 8. X-ray data are given for the tungsten complex 3b.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240541
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  • 2
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    Electronic Resource
    Reaktive E = C(p - p)π-Systeme, XXXI Erste Vertreter aminosubstituierter 1,2,4-Diazaphosphole (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 411-414 
    Details
    ISSN: 0009-2940
    Keywords: Phosphaalkyne, amino- ; [3 + 2] Cycloaddition ; 1,2,4-Diazaphospholes ; 1,2,3-Diazaphospholes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactive E = C(p - p)π Systems, XXXII[1].  -  First Representatives of Amino-Substituted 1,2,4-Diazaphospholes(Diisopropylamino)phosphaethyne iPr2N - C≡P reacts at 20° C in a [3 + 2] cycloaddition with (trifluoromethyl)diazomethane (2a) or methyl diazoacetate (2b) to yield a mixture of the corresponding regioisomers 1H-1,2,4-diazaphospholes (5a or 5b) and 1H-1,2,3-diazaphospholes (6a or 6b) in quantitative yields (isomer ratio: 5a/6a = 2:1; 5b/6b = 4:1). X-ray diffraction studies on 5a and 5b indicate a delicate charge balance in the bonding system of 1H-1,2,4,σ2-diazaphospholes under the influence of the exocyclic push/pull substituents iPr2N and CF3 or CO2Me, respectively.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250219
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  • 3
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    Synthese, Struktur und Eigenschaften der neuen Bromoselenate(II) [Se3Br8]2-, [Se4Br14]2- und [Se5Br12]2- Kristallstrukturen von [Cu(i-PropCN)4]2[Se3Br8], [EtPh3P]2[Se4Br14] und [n-Prop4N]2[Se5Br12]Professor Hanskarl Müller-Buschbaum zum 60. Geburtstage gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 597 (1991), S. 115-132 
    Details
    ISSN: 0044-2313
    Keywords: Selenium ; bromoselenates(II) ; preparation ; crystal structure ; FIR spectra ; Raman spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Structure, and Properties of the Novel Bromoselenates(II) [Se3Br8]2-, [Se4Br14]2-, and [Se5Br12]2-. Crystal Structures of [Cu(i-PropCN)4]2[Se3Br8], [EtPh3P]2[Se4Br14], and [n-Prop4N]2[Se5Br12]Using the symproportionation of elemental selenium and selenium tetrabromide in polar aprotic solvents a new class of tri-, tetra-, and pentanuclear bromoselenates(II) was obtained. In 2-methylpropionitrile solution the novel ion [Se3Br8]2- was stabilized and isolated as its black solvated copper salt. The crystals of [Cu(i-PropCN)4]2[Se3Br8] are monoclinic (C 2/c, a = 20.753(6), b = 13.344(4), c = 19.149(6) Å, β = 90.09(3)° at 140K, Z = 4) and contain trigonal star-shaped ions [Se3Br8]2- consisting of three edge-sharing square planar SeBr4 units. The mean terminal and μ3-bridging Se—Br bond lengths are 2.408 Å, respectively. [EtPh3P]2[Se4Br14] was obtained from dichloromethane solutions as dark red square-shaped crystals. The X-ray structure analysis (space group P 21/n, a = 11.400(3), b = 11.815(3), c = 20.720(A) Å, β = 92.50(3)° at 140 K, Z = 2) shows the crystals to contain tetranuclear ions [Se4Br14]2- that are built of two parallel planar [Se2Br6] units connected via two linear μBr-bridges. In the interesting delocalized electronic system a formal oxidation number of +1 has to be assigned to the bridging bromine. The mean terminal Se—Br bond length is 2.411 Å, the bridging bond lengths are 2.764 Å in the planar Se2Br6 units 2.594 Å in the linear Se—Br—Se bridges. Dark red [n-Prop4N]2[Se5Br12] was also isolated from CH2Cl2 solutions. It crystallizes in the tetragonal space group P 42/mnm (a = 14.798(3), c = 11.69(2) Å at 140 K, Z = 2) and its structure shows the novel pentanuclear ion [se5Br12]2-, consisting of a central square planar SeBr4 unit with two of its trans-edges being shared with additional pairs of square planar SeBr4, units. The anion can be described as two star-like Se3Br8 fragments with one sharing Se. The mean terminal and μ3-bridging Se—Br bond lengths are 2.343 Å and 2.956 Å, respectively. The vibrational spectra of the novel anions are reported and discussed.
    Notes: Durch Symproportionierung von elementarem Selen und Selentetrabromid in polaren protischen Lösungsmitteln wurde eine neue Klasse tri-, tetra- und pentanuklearer Bromoselenate(II) dargestellt. In 2-Methylpropionitril als Lösungsmittel wurde das strukturell neuartige Ion [Se3Br8]2- stabilisiert und als schwarzes solvatisiertes Kupfersalz isoliert. Kristalle von [Cu(i-PropCN)4]2[Se3Br8] sind monoklin (C2/c, a = 20,753(6), b = 13,344(4), c = 19,149(6) Å, β = 90,09(3)° bei 140K, Z = 4) und enthalten trigonale sternförmige Ionen [Se3Br8]2-, die aus drei kantenverknüpften quadratisch-planaren SeBr4-Einheiten bestehen. Die mittleren endständigen und μ3-verbrückenden Se—Br-Bindungslängen betragen 2,408 Å und 2,911 Å. [EtPh3P]2[Se4Br14] wurde aus Lösungen in Dichlormethan in Form dunkelroter Kristalle erhalten. Wie die Röntgenstrukturanalyse zeigt (Raumgruppe P21/n, a = 11,400(3), b = 11,815(3), c = 20,720(7) Å, β = 92,50(3)° bei 140K, Z = 2), enthalten sie vierkernige Ionen [Se4Br14]2-, die aus zwei parallel angeordneten, über lineare μBr-Brücken verknüpften Se2Br6-Einheiten aufgebaut sind. In diesem bemerkenswerten delokalisierten Elektronensystem muβ für das verbrückende Brom die formale Oxidationszahl + 1 angenommen werden. Die mittlere Se—Brterm-Bindungslängen sind 2,411 Å, die Brückenbindungslängen 2,764 Å in den planaren Se2Br6-Einheiten sowie 2,594 Å in den linearen Se—Br—Se-Brücken. Dunkelrotes [n-Prop4N]2[Se5Br12] konnte ebenfalls aus Lösungen in CH2Cl2 dargestellt werden. Es kristallisiert tetragonal (Raumgruppe P42/mnm, a = 14,798(3), c = 11,169(2) Å bei 140K, Z = 2). Seine Struktur enthält neuartige molekulare Ionen [Se5Br12]2-, die aus einer zentralen quadratisch-planaren SeBr4-Einheit bestehen, die über zwei trans-Kanten mit jeweils zwei weiteren quadratisch-planaren SeBr4-Einheiten verknüpft ist. Das Anion kann als über ein Selenatom verknüpfte Anordnung zweier sternförmiger Se3Br8-Fragmente beschrieben werden. Die mittleren endständigen und μ3-verbrückenden Se—Br-Abstände sind 2,343 Å und 2,956 Å. Über schwingungsspektroskopische Untersuchungen der neuen Anionen wird berichtet.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915970115
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  • 4
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    Zink-Koordinationsverbindungen mit Imidazolin- und Imidazol-DonorligandenProfessor Dietrich Mootz zum 60. Geburtstage gewidmet (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1183-1195 
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    ISSN: 0044-2313
    Keywords: Zinc complexes ; imidazole ; imidazoline ; bisimidazoline complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zinc Coordination Compounds with Imidazoline and Imidazole Donor Ligands.By reaction of the two bidentate bisimidazoline ligands 1,2-bis(2-imidazoline-2-yl)ethan (BIE) and 1,2-bis(2-imidazoline-2-yl)benzene (BIB) with zinc bromide under various reaction conditions the complexes [ZnBr2(BIE)] (1), [ZnBr2(BIB)] (2), [Zn(BIE)2]Br2 (3) and [Zn(BIB)2](BPh4)2 (4) were synthesized and characterized. In all compounds the zinc atom is tetrahedrally coordinated, either by a bidentate ligand and two bromine ligands, or by two of the chelate ligands. Zn—N—bond distances for 1-4 range from 1.966(2) to 2.013(3) Å, and the Zn—Br distances from 2.372(1) to 2.403(1) Å. [3-(imidazole-1-yl)-1-oxopropyl]benzene (IOB) was prepared as a novel imidazole ligand which carries a keto-O atom in 1,5-position to the pyridine-N atom. The zinc in [ZnCl2(IOB)2] (5) is coordinated by two ligands and two Cl atoms forming a distorted tetrahedral ZnN2Cl2 unit (Zn—N: 2.013(3) and 2.029(2) Å; Zn—Cl: 2.226(1) and 2.242(1) Å).The colourless compounds 1-5 were characterized by IR, 1H-NMR, X-ray absorption spectra and single-crystal X-ray structure analysis. Space groups and structural data: 1: P21/c, a = 7.717(2), b = 22.814(5), c = 8.026(2) Å, β = 117.58(2)° (140 K), R = 0.0283; 2: Cc, a = 11.831(3), b = 11.677(1), c = 11.846(1) Å, β = 114.55(2)°, R = 0.0237; 3: P42/n, a = 7.931(1), c = 16.945(1) Å, R = 0.0312; 4: P21/c, a = 18.666(2), b = 16.615(2), c = 19.786(2) Å, β = 99.17(1)°, R = 0.0472; 5: P21/c, a = 9.173(2), b = 9.230(1), c = 28.357(3) Å, β = 96.63(1)°, R = 0.0317.
    Notes: Durch Umsetzungen der zweizähnigen Bisimidazolin-Liganden 1,2-Bis(2-imidazolin-2-yl)ethan (BIE) und 1,2-Bis(2-imidazolin-2-yl)benzol (BIB) mit Zinkbromid unter verschiedenen Reaktionsbedingungen konnten die Komplexverbindungen [ZnBr2(BIE)] (1), [ZnBr2(BIB)] (2), [Zn(BIE)2]Br2 (3) und [Zn(BIB)2](BPh4)2 (4) synthetisiert und charakterisiert werden. Das Zinkatom ist jeweils tetraedrisch von einem zweizähnigen Chelatliganden und zwei Bromatomen oder von zwei dieser Liganden koordiniert. Die Zn—N-Bindungslängen in 1-4 variieren zwischen 1,966(2) und 2,013(3) Å, für die Zn—Br-Abstände wurden Werte zwischen 2,372(1) und 2,403(1) Å beobachtet. Mit dem neuen Liganden [3-(Imidazol-1-yl)-1-oxopropyl]benzol (IOB) gelang die Synthese des Komplexes [ZnCl2(IOB)2] (5), in dem eine tetraedrische ZnN2Cl2-Koordinationseinheit vorliegt (Zn—N: 2,013(3) und 2,029(2) Å; Zn—Cl: 2,226(1) und 2,242(1) Å).Die farblosen Verbindungen 1-5 wurden durch IR-, 1H-NMR- und Röntgenabsorptionsspektren sowie durch vollständige Röntgenstrukturanalysen charakterisiert. Raumgruppen und Gitterkonstanten: 1: P21/c, a = 7,717(2), b = 22,814(5), c = 8,026(2) Å, β = 117,58(2)° (140 K), R = 0,0283; 2: Cc, a = 11,831(3), b = 11,677(1), c = 11,846(1) Å, β = 114,55(2)°, R = 0,0237; 3: P42/n, a = 7,931(1), c = 16,945(1) Å, R = 0,0312; 4: P21/c, a = 18,666(2), b = 16,615(2), c = 19,786(2) Å, β = 99,17(1)°, R = 0,0472; 5: P21/c, a = 9,173(2), b = 9,230(1), c = 28,357(3) Å, β = 96,63(1)°, R = 0,0317.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190707
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  • 5
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    Chalkogenohalogenogallate(III) und -indate(III): Eine neue Verbindungsklasse in der dritten Hauptgruppe. Synthese und Struktur von [Ph4P]2[In2SX6], [Et4N]3[In3E3Cl6] · MeCN und [Et4N]3[Ga3S3Cl6] · THF (X = Cl, Br; E = S, Se)Professor Wilhelm Preetz zum 60. Geburtstage gewidmet (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1234-1246 
    Details
    ISSN: 0044-2313
    Keywords: Thio-chloro-indates ; thio-bromo-indates ; seleno-chloro-indates ; thio-chloro-gallates ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chalcogenohalogenogallates(III) and -indates(III): A New Class of Compounds for Elements of the Third Main Group. Preparation and Structure of [Ph4P]2[In2SX6], [Et4N]3[In3E3Cl6] · MeCN and [Et4N]3[Ga3S3Cl6] · THF (X = Cl, Br; E = S, Se)[In2SCl6]2-, [In2SBr6]2-, [In3S3Cl6]3-, [In3Se3Cl6]3-, and [Ga3S3Cl6]3- were synthesised as the first known chalcogenohalogeno anions of main group 3 elements. [Ph4P]2[In2SCl6] (1) (P1; a = 10.876(4) Å, b = 12.711(6) Å, c = 19.634(7) Å, α = 107.21(3)°, β = 96.80(3)°, γ = 109.78(3)°; Z = 2) and [Ph4P]2[In2SBr6] (2) (C2/c; a = 48.290(9) Å, b = 11.974(4) Å, c = 17.188(5) Å, β = 93.57(3)°, Z = 8) were prepared by reaction of InX3, (CH3)3SiSSi(CH3)3 and Ph4PX (X = Cl, Br) in acetonitrile. The reaction of MCl3 (M = Ga, In) with Et4NSH/Et4NSeH in acetonitrile gave [Et4N]3[In3S3Cl6] · MeCN (3) (P21/c; a = 17.328(4) Å, b = 12.694(3) Å, c = 21.409(4) Å, β = 112.18(1)°, Z = 4), [Et4N]3[In3Se3Cl6] · MeCN (4) (P21/c; a = 17.460(4) Å, b = 12.816(2) Å, c = 21.513(4) Å, β = 112.16(2)°, Z = 4), and [Et4N]3[Ga3S3Cl6] · THF (5) (P21/n; a = 11.967(3) Å, b = 23.404(9) Å, c = 16.260(3) Å, β = 90.75(2)°, Z = 4). The [In2SX6]2- anions (X = Cl, Br) in 1 and 2 consist of two InSX3 tetrahedra sharing a common sulfur atom. The frameworks of 3, 4 and 5 each contain a six-membered ring of alternating metal and chalcogen atoms. Two terminal chlorine atoms complete a distorted tetrahedral coordination sphere around each metal atom.
    Notes: [In2SCl6]2-, [In2SBr6]2-, [In3S3Cl6]3-, [In3Se3Cl6]3- und [Ga3S3Cl6]3- wurden als erste bisher bekannte Chalkogenohalogenoanionen von Elementen der 3. Hauptgruppe dargestellt. [Ph4P]2[In2SCl6] (1) (P1; a = 10,876(4) Å, b = 12,711(6) Å, c = 19,634(7) Å, α = 107,21(3)°, β = 96,80(3)°, γ = 109,78(3)°; Z = 2) und [Ph4P]2[In2SBr6] (2) (C2/c; a = 48,290(9) Å, b = 11,974(4) Å, c = 17,188(5) Å, β = 93,57(3)°, Z = 8) werden durch Reaktion von InX3, (CH3)3SiSSi(CH3)3 und Ph4PX (X = Cl, Br) in Acetonitril gebildet. [Et4N]3[In3S3Cl6] · MeCN (3) (P21/c; a = 17,328(4) Å, b = 12,694(3) Å, c = 21,409(4) Å, β = 112,18(1)°, Z = 4), [Et4N]3[In3Se3Cl6] · MeCN (4) (P21/c; a = 17,460(4) Å, b = 12,816(2) Å, c = 21,513(4) Å, β = 112,16(2)°, Z = 4) und [Et4N]3[Ga3S3Cl6] · THF (5) (P21/n; a = 11,967(3) Å, b = 23,404(9) Å, c = 16,260(3) Å, β = 90,75(2)°, Z = 4) können durch Umsetzung von MCl3 (M = Ga, In) mit Et4NSH (3), (5) bzw. Et4NSeH (4) in Acetonitril (3), (4) bzw. Tetrahydrofuran (5) erhalten werden. In den Kristallstrukturen der Titelverbindungen 1 bis 5 liegen isolierte Anionen und Kationen vor. Die [In2SCl6]2-- und [In2SBr6]2--Anionen in 1 und 2 lassen sich als Anordnung zweier über ein gemeinsames Schwefelatom eckenverknüpfter InSCl3- bzw. InSBr3- Tetraeder beschreiben. Die anionischen Teilstrukturen in 3, 4 und 5 werden durch drei Metallatome, die über μ2-E-Atome (E = Schwefel, Selen) zu einem Sechsring miteinander verbunden sind, aufgebaut, wobei zwei Chloratome an jedem Metallatom dessen verzerrt-tetraedrische Koordination vervollständigen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200718
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  • 6
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    Tripodal Ligands: Design of Distorted Coordination Polyhedra in Biomimetic Metal Complexes. Crystal structures of [Zn(SCN)(ntb)](SCN) · iPrpOH and [Fe(acac)(ntb)](ClO4)2 · 2CH2Cl2 · iPrpOH, ntb = N-tris(2-benzimidazolylmethyl)amineProfessor Gerhard Thiele zum 60. Geburtstag gewidmet (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 329-336 
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    ISSN: 0044-2313
    Keywords: Zinc complex ; iron complex ; tripodal ligand ; benzimidazole ; imidazole ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tripodliganden: Darstellung verzerrter Koordinationspolyeder in biomimetischen Metallkomplexen. Kristallstrukturen von [Zn(SCN)(ntb)](SCN) · iPrpOH und [Fe(acac)(ntb)](ClO4)2 · 2 CH2Cl2 · iPrpOH, ntb = N-Tris(2-benzimidazolylmethyl)aminDer Tripodligand N-Tris(2-benzimidazolylmethyl)amin (ntb) wurde zur Synthese eines Zink(II)- und eines Eisen(III)-Komplexes, [Zn(SCN)(ntb)](SCN) · iPrpOH (1) und [Fe(acac)(ntb)](ClO4)2 · 2 CH2Cl2 · iPrpOH (2), eingesetzt. Der Zinkkomplex hat eine stark verzerrte trigonal-bipyramidale Koordinationssphäre. Die koordinierenden Atome sind ein Amin-N, drei Benzimidazol-N und ein SCN--N-Atom. Auffällig hier ist der 2.539(6)Å große Zn—Namin-Bindungsabstand. Das Koordinationspolyeder des Eisenkomplexes ist weniger stark verzerrt als das in 1 und wird von einem Amin- und drei Benzimidazol-Stickstoffatomen des Liganden sowie zwei Sauerstoffatomen des Acetylacetonats gebildet. Die Fe—O-Bindungslängen zeigen eine Differenz von ca. 0.1 Å, die wie die ungewöhnlich lange Zn—N-Bindung durch einen Trans-Effekt verursacht wird. 1 kristallisiert triklin in der Raumgruppe P1 mit: a = 9.530(1), b = 13.402(1), c = 13.578(2)Å, α = 98.83(1), β = 95.19(1), γ = 101.21(1)°, Z = 2; 2 ist ebenfalls triklin, P1, mit: a = 9.875(6), b = 12.929(10), c = 18.635(15)Å, α = 94.95(8), β = 101.01(6), γ = 111.09(4)°, Z = 2.
    Notes: The tripodal ligand N-tris(2-benzimidazolylmethyl)-amine (ntb) was used for the preparation of zinc(II) and iron(III) complexes, [Zn(SCN)(ntb)](SCN) · iPrpOH (1) and [Fe(acac)(ntb)](ClO4)2 · 2CH2Cl2 · iPrpOH (2). 1 has a highly distorted trigonal-bipyramidal ZnN5 coordination geometry. The donor atoms are nitrogens of one amine, three benzimidazoles and one SCN-. A striking feature of the complex is the length of the Zn—Namine bond of 2.539(6)Å. The octahedral N4O2 coordination sphere of the iron in 2 is less distorted than that of the zinc in 1. The metal is surrounded by an amine and three benzimidazole nitrogens of the ligand and two oxygens of the bidentate acetylacetonate co-ligand. The Fe—O bond lengths differ by about 0.1 Å. As for the unusual long Zn—N bond in 1 this is a result of a trans effect. 1 crystallizes in the space group P1 with: a = 9.530(1)Å, b = 13.402(1)Å, c = 13.578(2)Å, α = 98.83(1), β = 95.19(1), γ = 101.21(1)°, Z = 2; 2 is also triclinic, space group P1, with: a = 9.875(6)Å, b = 12.929(10)Å, c = 18.635(15)Å, α = 94.95(8)°, β = 101.01(6)°, γ = 111.09(4)°, Z = 2.
    Additional Material: 4 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19966220221
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