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  • 1,3,2,4-Diphosphadiboretane-tetracarbonylchromium complexes  (1)
  • 1,3,2,4-Thiazaphosphaboretidine-2-sulfide derivative  (1)
  • Boranes, amino-, phosphanyl-  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 423-426 
    ISSN: 0009-2940
    Keywords: 1,2,3-Azaphosphaboriridine, 3-amino- ; Chromium complex, (3-amino-1,2,3-azaphosphaboriridine-P)- ; 1,3,2,4-Thiazaphosphaboretidine-2-sulfide derivative ; Tungsten complex, (3-amino-1,2,3-azaphosphaboriridine-P)- ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Boron, 196. - Preparation and Reaction of a 3-Amino-1,2,3-azaphosphaboriridineThe 1,2,3-azaphosphaboriridine 7, obtained by dehalogenation of the boryl(phosphino)amine precursor 6, reacts with sulfur or selenium not only with ring expansion but also with oxidation of its λ3-P atom to form the new heterocycles 8. The M(CO)5 fragments generated photolytically from Cr(CO)6 and W(CO)6, respectively, add to the P atom of 7. In contrast, MeI does not produce the phosphonium salt derived from 7. Rather the RP fragment is removed as iPr(Me)PI with formation of the iminoborane tmp-iPr.
    Notes: Das 1,2,3-Azaphosphaboriridin 7, dargestellt durch Enthalogenieren der Boryl(phosphino)amin-Vorstufe 6, reagiert mit Schwefel und Selen nicht nur unter Ringerweiterung, sondern zugleich unter Oxidation des λ3-Phosphors zu den neuen Heterocyclen 8. Während sich die aus Cr(CO)6 und W(CO)6 unter Photolyse erzeugten Pentacarbonylfragmente M(CO)5 an das P-Atom von 7 addieren, erhält man mit MeI kein Phosphoniumsalz. Vielmehr wird das RP-Fragment von 7 unter Bildung des Iminoborans tmp-tBu als iPr(Me)PI abgespalten.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-2940
    Keywords: 1,2,3,4-Diphosphadiboretane-tetracarbonyliron complexes ; 1,3,2,4-Diphosphadiboretane-tetracarbonylchromium complexes ; 1,2,3,4-Diphosphadiboretane, isomerisation of ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,2-Di-tert-butyl-3-(diisopropylamino)-4-(dimethylamino)- 1,2,3,4-diphosphadiboretane (1) reacts with Fe2(CO)9 to give two isomeric tetracarbonyliron complexes 2, 3 with P-Fe bonds and a bis(tetracarbonyliron) complex 4. In contrast, 1 displaces the olefinic ligand from tetracarbonyl(η4-norbornadiene)metal (metal = Cr, Mo) to form the tetracarbonylmetal complexes 5 and 6 with a rearranged ligand molecule, i.e. a 1,3,2,4-diphosphadiboretane. This process is accompanied by a change of the tert-butyl groups from an anti orientation in 1 to a syn orientation in 5 as shown by X-ray crystallography.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0009-2940
    Keywords: Boranes, amino-, phosphanyl- ; Diphosphadiboretanes ; Triphosphatriborinanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aminochlorophosphanylboranes, (R2N)B(Cl)P(SiMe3)2 (1a  -  d) and (R2N)B(Cl)PH2 (2a  -  d), are obtained from elimination reactions between aminochloroboranes and LiP(SiMe3)2 and LiPH2, respectively. Selected reaction chemistry of (i1-Pr2N)B(Cl)P(SiMe3)2] (1a) with NH3, Me3SiN3, Cr(CO)5 · NMe3, and W(CO)5 · NMe3 is described. The azide (i1-Pr2N)B(N3)P(SiMe3)2 (12a) is stable at 25°C; however, thermolysis at 80°C provides a novel six-membered ring compound [(i1-Pr2N)BN(SiMe3)P(SiMe3)]2 (13a). The reaction of (Ph2N)B(Cl)P(SiMe3)2 (1b) with LiP(SiMe3)2 produces the only isolable bis(phosphanyl)borane (5b), while combination of (R2N)B(Cl)Ph2 with LiPH2 · DME yields new diphosphadiboretanes 6 {(R2N)BPH}2 (R2N=i1-Pr2N, Ph2N and tmp=2,2,6,6-tetramethylpiperidino) and triphosphatriborinanes 7 {(R2N)BPH}3 (R2N=(Me3Si)2N, Me2N and Et2N). Two salts, [(i1-Pr2N) DME]2 (8a) and [tmpLi · DME]2 (8c) (DME=ethylene glycol dimethyl ether) are also isolated. The results of molecular structure determinations for [(i1-Pr2N)Bn(SiMe3)P(SiMe3)]2 (13a), [tmpBPH]2 (4c), [tmpBPH]2 · Cr(CO)5 (7c), {[(Me3Si)2N]BPH}3 (4d), {[(Me3Si)2N]BPH}3 · Cr(CO)5 (7d), (Ph2N)B[P(SiMe3)2]2 (5b), and [(i1-Pr2N) · DME]2 (8a) are discussed.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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