Hydrolysis of Diborane(4) Compounds

Baber, R. Angharad; Charmant, Jph; Lesley, Mjg; Norman, N. C.; Orpen, A. Guy; Rossi, Jean‐Claude

doi:10.1021/bk-2005-0917.ch010

Cited by 2 publications

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“…Only three structures have been reported previously with B 4 O 2 rings that are not part of a polycyclic system; two are cocrystals of B 4 O 2 (OH) 4 in which each B atom has a hydroxy substituent (Carmalt et al, 1997;Baber et al, 2006), and the third is B 4 O 2 (N i Pr) 4 , in which each B atom has a diisopropylamide substituent (Maringgele et al, 1997). The title structure is unprecedented in this series in having one substituent on each of two B atoms and two on each of the other two, giving two B atoms with trigonal geometry and two with distorted tetrahedral geometry.…”

Section: Commentmentioning

confidence: 99%

2,3,5,6-Tetrakis[3,5-bis(trifluoromethyl)phenoxy]-2,5-bis(dimethylamino)2,3,5,6-tetrabora-1,4-dioxane diethyl ether 0.667-solvate

Clegg¹,

Marder²,

Nlate³

et al. 2007

Acta Crystallogr C

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The title compound, C(36)H(26)B(4)F(24)N(2)O(6).0.667C(4)H(10)O, has centrosymmetric tetraboradioxane molecules, half each of three of these comprising the asymmetric unit together with a molecule of diethyl ether. Disorder affects most of the CF(3) groups and one ethyl group of the solvent molecule. The B(4)O(2) rings are approximately planar and contain two B atoms with trigonal geometry and two with distorted tetrahedral geometry, the B-O bonds for the four-coordinate B atoms being longer than those for the three-coordinate B atoms. N-H...O hydrogen bonds link two of the crystallographically independent molecules together in chains, while the third molecule forms discrete trimolecular clusters with two solvent molecules via N-H...O hydrogen bonds. This is the first crystallographically characterized example of a tetrabora-dioxane molecule containing both four- and three-coordinate B atoms.

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Section: Commentmentioning

confidence: 99%