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  • 1,3,2,4-Diphosphadiboracyclobutane  (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: 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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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 611-618 
    ISSN: 0009-2940
    Keywords: Phosphanylboranes, tetraorganyl ; 1,3,2,4-Diphosphadiboracyclobutane ; Diboranes, μ1-phosphanyl- ; Thiophosphinate, S1-boryl ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Contributions to the Chemistry of Boron, 215[1]. - Synthesis and Reactions of Monomeric Tetraorganyl-phosphanyl-boranesThe reaction of diorganyl-chloroboranes with lithium diorganyl-or lithium bis(trimethylsilyl)phosphides leads to the monomeric phosphanylboranes tBu2BPtBu2 (1), tBu2BP(SiMe3)2 (2), 9-BBNPtBu2 (3), 9-BBNP(SiMe3)2 (4), and Cy2BPtBu2 (5). These species were studied by NMR-spectroscopic methods. For further characterization reactions of the compounds 1, 3, and 5 have been investigated. Heating of 1 and 5 results in the formation of the dimeric phosphanylboranes tBu(H)BPtBu2 (8) and Cy(H)BPtBu2 (9) by dehydroboration. Dimers 8 and 9 are present as cis- and trans1-isomers as confirmed by X-ray structure analyses. The trans1-isomer of 9 shows a planar (BP)2 four-membered ring, whereas the ring of the cis1-isomer of 8 is slightly folded. Furthermore, the reaction of 3 with 9H-9-BBN yields (μ1-H)(μ-tBu2P)[9-BBN]2 (14), whose bridged structure is proven by a crystal structure analysis. Oxidation of the phosphorus atom in 3 with sulfur leads to the S1-boryl thiophosphinate tBu2(S)PS-9-BBN (16).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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