π-Bonding in B–O ring species: Lewis acidity of Me3B3O3, synthesis of amine Me3B3O3 adducts, and the crystal and molecular structure of Me3B3O3.NH2iBu·MeB(OH)2

Autor:	Paul Owen, K. M. Abdul Malik, David S. Brassington, Michael A. Beckett, Michael B. Hursthouse, Mark E. Light, K. Sukumar Varma
Rok vydání:	1999
Předmět:	Stereochemistry Organic Chemistry Ring (chemistry) Biochemistry Boroxine Adduct Inorganic Chemistry Crystallography chemistry.chemical_compound Isobutylamine Benzylamine chemistry Morpholine Materials Chemistry Molecule Piperidine Physical and Theoretical Chemistry
Zdroj:	Journal of Organometallic Chemistry. 585:7-11
ISSN:	0022-328X
DOI:	10.1016/s0022-328x(99)00182-5
Popis:	The synthesis and characterisation (m.p., elemental analysis, IR, NMR) of some previously unreported Me3B3O3. L adducts (L=piperidine, isobutylamine, morpholine, 3-picoline, benzylamine) are described. The crystal and molecular structure of (Me3B3O3NH2Bu)-Bu-i . MeB(OH)(2) has been determined by a single-crystal X-ray diffraction study. The structure reveals an unusual H-bond interaction between MeB(OH)(2) and a ring O atom of the six-membered B3O3 ring of the trimethylboroxine adduct, Me3B3O3. (NH2Bu)-Bu-i. The direction of the H-bond strongly suggests sp(2) hybridisation for this O atom. The Lewis acidity of Me3B3O3, Ph3B3O3, 1,3,5-Ph3B3N3Me3 and 1,3,5-Ph3C6H3 have been estimated by Gutmann's method and data interpreted in terms of relative K-bonding strength within these ring systems.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::91e9cd527be020346f404f435ca00afc https://doi.org/10.1016/s0022-328x(99)00182-5 Zobrazit plný text záznamu Full Text from ScienceDirect