115270-29-6Relevant articles and documents
Novel drums and mixed-drum organooxotin clusters from carboxylic, phosphinic, and phosphoric acids
Day, Roberta O.,Chandrasekhar,Swamy, K. C. Kumara,Holmes, Joan M.,Burton, Sarah D.,Holmes, Robert R.
, p. 2887 - 2893 (2008/10/08)
A variety of new drum geometries were synthesized by a condensation reaction of an alkylstannonic acid with either a carboxylic acid or a phosphorus-based acid. The structures of [MeSn(O)O2CMe]6 (1), [(MeSn(O)O2CMe)(MeSn(O)O2P(t-Bu)2)]3 (2), and [n-BuSn(O)O2P(OPh)2]6 (3) were revealed by X-ray analysis. Interestingly, the mixed-drum composition 2 resulted from the reaction of the drum formulation 1 with di-tert-butylphosphinic acid. Also an oxygen-capped cluster [(n-BuSn(OH)O2P-(OPh)2)3O][(PhO) 2PO2] (8) is formed when the same reaction that was used to prepare 3 is conducted at 25°C rather than at reflux. 1 crystallizes in the rhombohedral space group R3 with aH = 17.420 (5) A?, cH = 9.963 (2) A?, and Z = 3. 2 crystallizes in the monoclinic space group C2/c with a = 21.495 (4) A?, b = 28.032 (6) A?, c = 10.013 (2) A?, β = 95.34 (2)°, and Z = 4. 3 crystallizes in the monoclinic space group P21/n with a = 14.252 (3) A?, b = 17.346 (2) A?, c = 21.987 (3) A?, β = 91.62 (1)°, and Z = 2. The conventional unweighted residuals were 0.023 (1), 0.036 (2), and 0.040 (3).
