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Solution and solid-state structural properties of silver(I) poly(pyrazolyl)borate compounds with bidentate diphosphines

✍ Scribed by Effendy; Giancarlo Gioia Lobbia; Maura Pellei; Claudio Pettinari*; Carlo Santini*; Brian W. Skelton; Allan H. White

Book ID: 104138443
Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 188 KB
Volume: 315
Category: Article
ISSN: 0020-1693
DOI: 10.1016/s0020-1693(01)00332-2

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✦ Synopsis

New silver(I) derivatives containing bidentate tertiary phosphines and anionic poly(pyrazol-1-yl)borates have been prepared from AgNO 3 and bis(diphenylphosphino)methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-bis(diphenylphosphino)propane (dppp), 1,4-bis(diphenylphosphino)butane (dppb) or 1,1%-bis(diphenylphosphino)ferrocene (dppf) and K

] (pzH= pyrazole); their solid state and solution properties have been investigated through analytical and spectroscopic measurements (IR, 1 H and 31 P NMR). The 1 H and 31 P NMR spectra have been interpreted with equilibria that involve mono-and di-nuclear complexes, or the presence of 1:1 and 1:2 silver-diphosphine species. The compounds are soluble in chlorinated solvents and are non-electrolytes in CH 2 Cl 2 and acetone solutions. The structures of [(dppf){Ag(pz) 2 BX 2 }], X =H, pz have been determined by single crystal X-ray studies, the poly(pyrazolyl)borates being always bidentate with the silver(I) centers in distorted tetrahedral geometries.

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