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
URL:
http://dx.doi.org/10.1002/cber.19931260311
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