Structural studies on substitutedpentarutheniumcarbido carbonyl clustersfn2fn2Dedicated to Jack Lewis on the occasion of his 70thbirthday.

The structures of [Ru5C (CO) 14L] , where L = P (4-C6H4OMe) 3, 2a, P (4-C6H4F) 3,2b,and PCy3, 2c, and of [Ru5C (CO) 13 (etpb) 2] (etpb = P (OCH2) 3CEt) ) , 3, have been determined. The Ru — Ru andRu — Pbond distances of the [Ru5C (CO) 15−nLn] clusters, 2a, 2b, 2c, 3, [Ru5C (CO) 14 (PPh3) ] , and [Ru5C (CO) 13 (PPh3) 2] , were analyzed and the resultsarecompared with those reported elsewhere for the unsubstituted parent cluster, and for …