Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-60398
Fraga-Hernandez, J; Blacque, O; Berke, H (2011). Bis1,3-bis(2,4,6-trimethylphenyl)-2,3-dihydro-1H-imidazol-2-ylidene]d initrosyl(tetrahydroborato-kappa(2)H,H `)tungsten(0). Acta Crystallographica. Section E, Structure Reports Online, 67(Part 1):M94-U996.
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In the title paramagnetic 19-electron neutral complex, W(BH(4))(C(21)H(24)N(2))(2)(NO)(2)], the W(0) atom is coordinated by two 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene (IMes) carbene ligands, two NO groups and two H atoms of an eta(2)-tetrahydroborate ligand. Depending on the number of coordination sites (n) assigned to the BH4(-) ligand, the coordination geometry of the W atom may either be described as approximately trigonal-bipyramidal (n = 1) or as very distorted octahedral with the bridging H atoms filling two coordination positions (n = 2). In the latter case, the coplanar NO groups and bridging H atoms (r.m.s. deviation = 0.032 angstrom) form one octahedral plane, with mutually trans-oriented carbene ligands. In the crystal, molecules are connected via C-H center dot center dot center dot O interactions.
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|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||07 Faculty of Science > Department of Chemistry|
|Deposited On:||12 Mar 2012 17:16|
|Last Modified:||30 Nov 2013 04:36|
|Other Identification Number:||ISI:000285628900082|
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