ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Structural Chemistry of Phosphorus-containing Chains and Rings. 2. Crystal and Molecular Structure of the Diphosphaborirane (t-BuP)2BNEt2The three-membered P2B-heterocycles 1,2-di-tert-butyl-3-diethylamino-1,2,3-diphosphaborirane, (t-BuP)2BNEt2, crystallizes triclinic in the space group P1 with a = 935.5 pm, b = 985.4 pm, c = 987.4 pm,α = 81.55°, β = 89.40°, γ =69.07°, and Z = 2 formula units. The main structural feature is a short B—N-bond length (138.2 pm) inside a plane P2BN-group. The endocyclic bond angles are 54.0° on phosphorus and 72.0° on boron. The (average) bond lengths are P—P = 222.5 pm, P—C = 189.5 pm, P—B = 189.3 pm, B—N = 138.2 pm, N—C = 147.2 pm, C—C = 152.6 pm, and C—H = 98 pm. The geometry of the substituents ethyl and tert-butyl is quite normal.
Notes:
Der P2B-Dreiring-Heterocyclus 1,2-Di-tert-butyl-3-diethylamino-1,2,3-diphosphaboriran, (t-BuP)2BNEt2, kristallisiert triklin in der Raumgruppe P1 mit a = 935,5 pm, b = 985,4 pm, c = 987,4 pm,α = 81,55°,β = 89,40°, = 69,07° und Z = 2 Formeleinheiten. Innerhalb der planaren P2BN-Gruppierung tritt als besonderes strukturelles Merkmal ein kurzer Bor-Stickstoff-Abstand von 138,2 pm auf. Die endocyclischen Bindungswinkel betragen am Phosphor 54,0° und am Bor 72,0°. Die (gemittelten) Bindungslängen sind P—P = 222,5 pm, P—C = 189,5 pm, P—B = 189,3 pm, B—N = 138,2 pm, N—C = 147,2 pm, C—C = 152,6 pm und C—H = 98 pm. Die Geometrie der Substituenten Ethyl und tert-Butyl ist normal.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19814740304
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