218770-82-2Relevant articles and documents
Ruthenium-(II) and -(III) complexes of a ditertiary stibine ligand. The effect of co-ordination on stibine ligand geometry
Holmes, Nicholas J.,Levason, William,Webster, Michael
, p. 3457 - 3461 (2007/10/03)
The complexes trans-[RuX2{Ph2Sb(CH2)3SbPh 2}2] (X = Cl, Br or I) have been prepared from [Ru(dmf)6][CF3SO3]3, LiX and the distibine (dmf = dimethylformamide), and characterised by chemical analysis and UV/VIS spectroscopy. They are oxidised by HNO3 in HBF4 solution to trans-[RuX2{Ph2Sb(CH2)3SbPh 2}2]BF4. The latter have been characterised by similar techniques, and the RuII-RuIII redox potentials established electrochemically. The crystal structures of Ph2Sb(CH2)3SbPh2 and trans-[RuBr2{Ph2Sb(CH2)3SbPh 2}2]·2CH2Cl2 [Ru-Sb 2.5758(5), 2.6043(8); Ru-Br 2.5770(7) A] have been determined. Using data from the Cambridge Crystallographic Database on transition metal SbPh3 complexes, the present complexes, and those of Ph2SbCH2SbPh2, the effect of co-ordination on the C-Sb-C angles and the Sb-C distances has been examined. A correlation of increased C-Sb-C angles with decreased Sb-C distances is observed on co-ordination. ? Supplementary data available: Cambridge Structural Database 'refcodes' of the compounds used as well as the bond lengths and angles of all the fragments. For direct electronic access see http://www.rsc.org/ suppdata/dt/199S/3457/, otherwise available from BLDSC (No. SUP 57433, 5 pp.) or the RSC Library. See Instructions for Authors, 1998, Issue 1 (http://www.rsc.org/dalton).
