A series of RuCl2 complexes of 3,4-dimethylphosphacymantrene (L) have
been synthesized. Their structures were established on the basis of H-
1, C-13, P-31 NMR and IR spectroscopy. Two of them, trans-[RuCl2(L)4]
and cis,cis,trans-[RuCl2(CO)2(L)2] were characterized by X-ray crystal
structure analysis, and show the ligands L to bond via normal P-Ru si
gma bonds, with Ru-P distances in the range 2.288(1)-2.339(1) angstrom
.