ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Characterization of the Dimeric Diorgano(organophosphinoyloxy)boranes in Solution and in Solid State1)The diorgano(phenylphosphinoyloxy)boranes R2BOP(O)C6H5R′ [1: R2 = (C2H5)2, R′ = C6H5; 2: R2 = C8H14 = 1,5-cyclooctanediyl, R′ = C6H5; 3: R2 = (C2H5)2, R′ = H; 4: R2 = C8H14, R′ = H] are characterized using NMR spectra (1H, 11B, 13C, 31P). In solution 1 - 4 exhibit monomer/dimer equilibria as a result of -P-O-B- coordination. (3)2 and (4)2 occur as cis/trans isomers. In the solid state the (POBO)2 eight-membered ring of (1)2 has a boat conformation, whereas that of the chiral (4)2 has a half-chair conformation (X-ray structure analyses).
Notes:
Die unter -P-O-B- Koordination im Monomeren/Dimeren-Gleichgewicht stehenden Diorgano(phenylphosphinoyloxy)borane R2BOP(O)C6H5R′ [1: R2 = (C2H5)2, R′ = C6H5; 2: R2 = C8H14 = 1,5-Cyclooctandiyl, R′ = C6H5; 3: R2 = (C2H5)2, R′ = H; 4: R2 = C8H14, R′ = H] werden in Lösung mittels der NMR-Spektren (1H, 11B, 13C, 31P) charakterisiert. (3)2 und (4)2 treten als cis/trans-Isomere auf. In festem Zustand bildet (1)2 einen (POBO)2-Achtring mit Wannen-Struktur, während das chirale (4)2 als (POBO)2-Achtring mit Halbsessel-Konformation vorliegt (Röntgenstrukturanalysen).
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19841170908
