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  • 1
    Electronic Resource
    Electronic Resource
    On the Chemistry of Gallium, 8Part 7: Ref.[1].. Synthesis and Structure of [Tris(trimethylsilyl)silyl]-Substituted Gallanes and Gallates (1996)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 129 (1996), S. 561-569 
    Details
    ISSN: 0009-2940
    Keywords: Silylgallanes ; Gallium compounds ; Hydroxygallium compounds ; Gallium alkoxides ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of lithium tris(trimethylsilyl)silanide · 3 THF with R2GaCl (R = 2,2,6,6-tetramethylpiperidino, Me, Cl) yields tmp2GaSi(SiMe3)3 (3) and R2Ga(THF)Si(SiMe3)3 (R = Me, Cl) (7, 9). Both gallium nitrogen bonds in 3 are cleaved by protic reagents. Depending on the acidity of these agents, either oligomeric gallanes [(RO)2GaSi(SiMe3)3]n (R = Et, H, n = 2, 3) (11, 12) or tetramethylpiperidinium gallates [X3GaSi-(SiMe3)3]- (X = OPh, Cl) (13, 14) are formed. Hydroxide 11 adds lithium hydroxide to afford the mixed lithium gallium hydroxide 15. Single-crystal X-ray diffraction studies confirm the suggested constitutions. The gallium-silicon bond can adopt values between 236 and 247 pm. Here electronic influences of the substituents on the gallium center are of great importance as well as their steric demand. This is underlined by quantum chemical calculations on the ab initio (SCF) level.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19961290514
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  • 2
    Electronic Resource
    Electronic Resource
    Monomeric Phosphanylgalanes  -  Synthesis and Structural Characterization (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 663-668 
    Details
    ISSN: 0009-2940
    Keywords: Phosphanylgallanes ; Gallium amino compounds ; P Ligands ; Gallium ; Ab initio calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The monomeric phosphanylgallanes R2GaPR'R (R = tmp, Mes; R' = H, tBu; R' Mes, tBu), the diphosphanylgallane mesGa(PtBu2)2, and diphosphandiylbisgallane [tmp2GaP-(tBu)]2, have been synthesized from alkali metal phosphides and substituted gallium chlorides. Low-temperature NMR studies of the phosphanylgallanes reveal no barrier to rotation about the gallium-phosphorus bond. Analysis of the crystal structures of tmp2GaPtBu2 confirms the monomeric nature of these molecules. The gallium-phosphorus bond lengths are found to be 237.5, 233.5, 235.4 pm (averaged), and 242.3 pm, respectively, with all phosphorus atoms being pyramidally coordinated.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300519
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Chemie des Galliums. 10. N-Trimethylsilyl-substituierte AminogallaneProfessor Wolfgang Beck zum 65. Geburtstag gewidmet (1997)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 531-538 
    Details
    ISSN: 0044-2313
    Keywords: Gallium ; aminogallanes ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Chemistry of Gallium. 10. N-Trimethylsilyl Substituted AminogallanesThe synthesis of the monomeric mono(amino)gallanes 9, 10 is achieved by reaction of dialkylgallium chlorides R2GaCl (R = Me, Et) with lithium amides LiN(SiMe3)R′ [R′ = tBu, 2,6-iPr2C6H3 (= dipp)]. Combination of gallium(III)chloride with LiN(SiMe3)dipp results in the formation of the bis(amino)gallium chloride dipp(SiMe3)NGa(Cl)Ndipp(SiMe2)N(SiMe3)dipp 12. Oxidation of 9 affords the aminoethoxygallane [dippN(SiMe3)Ga(Et)μ-OEt]2 13, the structure of which is compared to that of the dialkylalkoxygallane 14.
    Notes: Die Darstellung der monomeren Mono(amino)gallane 9, 10 gelingt durch Umsetzung von Dialkylgalliumchloriden R2GaCl (R = Me, Et) mit den Lithiumamiden LiN(SiMe3)R′ [R′ = tBu, 2,6-iPr2C6H3 ( = dipp)]. Aus Gallium(III)chlorid und LiN(SiMe3)dipp entsteht das Bis(amino)galliumchlorid dipp(SiMe3)NGa(Cl)Ndipp(SiMe2)N(SiMe3)dipp 12. Die Oxidation von 9 ergibt das Aminoethoxygallan [dipp(SiMe3)NGa(Et)μ-OEt]2 13, dessen Struktur mit der des Alkoxygallans 14 verglichen wird.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19976230183
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  • 4
    Electronic Resource
    Electronic Resource
    Monomere Bis- und Tris(amide) des Indiums (1996)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1060-1064 
    Details
    ISSN: 0044-2313
    Keywords: Tris(2,2,6,6-tetramethylpiperidino)indium; bis(2,2,6,6-tetramethylpiperidino)indium bromide; indium amides; X ray structure analysis ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Monomeric Bis and Tris(amides) of IndiumThe synthesis of tris(2,2,6,6-tetramethylpiperidino)indium 1 and of bis(2,2,6,6-tetramethylpiperidino)indium bromide 2 are described. Both compounds were characterized by NMR and mass spectroscopy. They are monomeric in solution and gasphase. A crystal structure analysis of 1, also described in this work, proofs monomeric 1 in the solid state, too.
    Notes: Die Darstellung von Tris(2,2,6,6-tetramethylpiperidino)indium 1 und von Bis(2,2,6,6-tetramethylpiperidino)-indiumbromid 2 werden beschrieben. Beide Verbindungen wurden NMR und massenspektroskopisch untersucht. Sie liegen in Lösung und Gasphase monomer vor. Die Analyse der Kristallstruktur von 1 belegt dessen monomeres Vorliegen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19966220621
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