Isomerization of RuCl2(Cyttp) (Cyttp=C6H5P(CH2CH2CH2P(C6H11)2)2) in solution
摘要:
The structure of RuCl2(Cyttp) (Cyttp = C6H5P(CH2CH2CH2P(C6H11)2)2) in solution is very dependent on the polarity and coordination ability of the solvents. In non-polar solvents such as benzene, mer-RuCl2(Cyttp) and fac-RuCl2(Cyttp) are present in about equal quantity. In halogenated solvents (such as dichloromethane, chloroform, CDCl2CDCl2), three isomers are present: fac-RuCl2(Cyttp) (predominant), [Ru2Cl3(Cyttp)2]Cl (minor) and mer-RuCl2(Cyttp) (trace). In other polar solvents such as CD3COOD and CD3NO2 the ionic dinuclear complex [Ru2Cl3(Cyttp)2]Cl is the major species along with fac-RuCl2(Cyttp). In methanol, only [Ru2Cl3(Cyttp)2]Cl is present. Acetonitrile complexes are formed when RuCl2(Cyttp) is treated with acetonitrile. The X-ray structure of fac-RuCl2(Cyttp) has been determined in space group P2(1)/n with cell parameters a = 11.912(4), b = 11.953(2), c = 31.303(8) angstrom, beta = 94.32(2)-degrees, V = 4444 angstrom-3, Z = 4, R = 0.042 and R(w) = 0.050 for the 4985 intensities with F(0)2 > 3-sigma-(F(o)2) and the 439 variables.