Supramolecular structures containing 'isolated' pentaborate anions and non-metal cations: Crystal structures of [Me3NCH2CH2OH][B5O6(OH)(4)] and [4-MepyH, 4-Mepy][B5O6(OH)(4)]
Beckett, M.A.C.C., Horton, P.N., Hursthouse, M.B. and Varma, K.S. (2007) Supramolecular structures containing 'isolated' pentaborate anions and non-metal cations: Crystal structures of [Me3NCH2CH2OH][B5O6(OH)(4)] and [4-MepyH, 4-Mepy][B5O6(OH)(4)]. Journal of Organometallic Chemistry, 692, (13), 2832-2838. (doi:10.1016/j.jorganchem.2007.02.038).
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The solid-state structures of two non-metal pentaborates [Me3NCH2CH2OH][B5O6(OH)4] (1) and [4-MepyH, 4-Mepy][B5O6(OH)4] (2) have been determined by single-crystal X-ray diffraction methods. Structures 1 and 2 both contain supramolecular pentaborate frameworks held together by extensive H-bond interactions. The framework of 1 exists essentially as planes of pentaborate anions linked via three pairwise ‘planar’ β → greek small letter alpha interactions, with a fourth β → β interaction crosslinking the planes. The framework of 2 is very similar except that one of the three pairwise linkages within the plane is replaced by pairwise ‘step-like’ bifurcated H-bonds to both greek small letter alpha sites of a neighboring anion. The cations in 1 and the cations and neutral 4-Mepy ligands in 2 are present in the framework cavities and channels, with additional H-bond interactions existing between cations and anions.
|Keywords:||non-metal cations, x-ray diffraction, structures,h-bond interactions, pentaborate, supramolecular|
Q Science > QD Chemistry
|Divisions:||University Structure - Pre August 2011 > School of Chemistry
|Date Deposited:||31 Jul 2008|
|Last Modified:||01 Jun 2011 12:01|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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