Journal of Cluster Science, Vol. 9, No. 2, 1998 Reactions of Triruthenium Clusters with Quinolines: X-Ray Structures of [Ru3(n-CO)(CO)7{ji3-Ti2- P(C6H5)CH2P(C6H5) 2)}{n-T12-C9H5(CH3)N}] and [Ru3(CO)10(n-H){m-n2-C9H6N}] Shariff E. Kabir,1 Tasneem A. Siddiquee,1 Edward Rosenberg,2'5 Ryan Smith,2 Michael B. Hursthouse,3 K. M. Abdul Malik, 3 Kenneth I. Hardcastle,4 and Mandana Visi4 Received January 15, 1998 INTRODUCTION We recently reported on the synthesis and reactivity of a novel class of electron deficient triosmium clusters [Os3(CO) 9(^-H){^3-^2-C9H5RN} ] l(R = a wide range of substituents in the 3, 4, 5, and 6-positions of the 1 Department of Chemistry, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh. 2 Department of Chemistry, The University of Montana, Missoula, MT 59812. Department of Chemistry, University of Wales Cardiff, P.O. Box 912, Cardiff CF1 3TB, United Kingdom 4 Department of Chemistry, California State University, Northridge, CA 91330 5 To whom correspondence should be addressed. The reactions of [Ru3(CO)10(/*-dppm)] 4 with quinolines afforded [Ru 3 (^-CO)(CO)7{^3V2-P(C6H5)CH2P(C6H5)2)}{//V-C9H5(R)N}] (8, R = 4-Me; 9, R = H) as the major products along with small amounts of known compound [Ru3(CO)9{^3y3-P(C6H5)CH2P(C6H5)(C6H4)}] 5. The molecular structure of 8 has been determined by single crystal X-ray studies. The reaction of 5 with 4-methylquinoline in refluxing cyclohexane afforded 8 and two known dinuclear compounds, [Ru 2 (CO) 6 {^-CH2 P(C6 H5 )(C6 H4 )P(C6 H5 }] 10 and [Ru2(CO) 6 {//-(C6H4)P(C6H5)(CH2)P(C6H5}] 11, in 40, 12, and 10% yields, respectively. The compounds 10 and 11 are also formed from the thermolysis of 4 in addition to the major compound 5. The solid state structure of the previously reported [Ru3(CO) 10(^-H){/i-n2-C9H6N} ] 2a is also reported for comparison. KEY WORDS: Ruthenium; clusters; bridging ligands; quinolines. 185 1040-7278/98/0600-0185115.00/0 © 1998 Plenum Publishing Corporation