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N,P-Coordination of an Amino(imino)phosphane

✍ Scribed by Prof. Dr. Otto J. Scherer; Jürgen Kerth; Ralf Anselmann; Prof. Dr. William S. Sheldrick

Book ID
101552879
Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
235 KB
Volume
22
Category
Article
ISSN
0044-8249

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✦ Synopsis

the lability of Pv-Teri compounds (tellurium atom transfer between phosphanes)"]. Thus, we have recently shown that tellurium can be inserted into the P-Si bond of di-tertbutyl(trimethylsily1)phosphane la, but is incapable of inducing a further oxidation of the tellurophosphinite 2a['"'. The insertion product merely equilibrates with the symmetrically substituted tellurium compounds 3 and 4. We have now found that when a less bulky silylphosphane is used as starting material, a novel P-P coupling by detelluration (3 -f 5) follows the reaction steps 1 + 2 and 2 -, 3 + 4 : diphenyl(trimethylsily1)phosphane l b reacts smoothly with tellurium to give tetraphenyldiphosphane 5b and bis(trimethylsilyl) telluride 4. + 2 Te 3 li2PSiAle3 -d 2 RzP-le-SiR.le3 l a , It = t H u l b . K = P h 2 \ 11 z P -1 ~~ -PK2 + hIe3Si-'I'e-Si >,I e3 4 + t e 11 -Tc

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The formation of four products of the type Me ) and the hydroboranes (R' 2 BH) 2 is described. Crystal structure analysis re-veals the molecule 1 to have an N=B±N=B backbone with two orthogonal N=B bond planes and, hence, no conjugation between the two B±N double bonds.