yo -machi, Nagasaki 852, Japan The hydridoruthenium(1i) complex [RuCI(CO)H (PPh,),] (1 ) reacted easily with methyl acrylate and N,N-dimethylacrylamide to give the corresponding insertion products, [Ru{CH,CH,C(O) -OMe}CI(CO)(PPh,),] * It was erroneous that in ref. 26, (8) was ascribed to a structure in which the two PPh, ligands were located at trans positions to each other. The 'H n.m.r. data of (8) in ref. 26 are revised in Table 2, owing to the correction of calibration.

Organoruthenium?l) Complexes Formed by Insertion Reactions of Some Vinyl Compounds and Conjugated Dienes into a Hydrido ‐ Ruthenium Bond.

A hydridoruthenium(II) complex [RuClH(CO)(PPh3)3] reacted easily with acrylonitrile and fumaronitrile to give chloro-bridged binuclear (1-cyanoethyl)ruthenium(II) complexes, [{Ru(MeCHCN)Cl(CO)(PPh3)2}2] (2) and [{Ru(NCCH2CHCN)Cl(CO)(PPh3)2}2], respectively. Complex 2 reacted with 4-picoline (pic), Na[BHPz3] (Pz=1-pyrazolyl), Na[BPz4], and Na[Et2NCS2]·3H2O to afford the corresponding (1-cyanoethyl)ruthenium(II) complexes, [{Ru(MeCHCN)Cl(CO)(pic)(PPh3)}2] (3), [Ru(MeCHCN)(BHPz3)(CO)(PPh3)] (accompanied by a small amount of [Ru2(MeCHCN)2Cl(BHPz3)(CO)2(PPh3)4]), [Ru2(MeCHCN)2Cl(BPz4)(CO)2(PPh3)2], and Na[Ru(MeCHCN)Cl(Et2NCS2)(CO)(PPh3)], respectively. Complex 3 reacted with thallium(I) acetylacetonate [Tl(acac)], resulting in the formation of [{Ru(MeCHCN)(acac)(CO)(PPh3)}2] and [Ru(MeCHCN)(acac)(CO)(pic)(PPh3)]. These new complexes were characterized by means of elemental analysis and spectroscopic data. The diastereoisomerism was also discussed as regards these (1-cyanoethyl)ruthenium(II) complexes.