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Acknowledgment is made to the donors of the Petroleum Research Fund, administered by the American Chemical Society, for partial support of this work. The authors also wish to thank Johnson-Matthey, Inc., for loan of the ruthenium used in this study. In addition, the help of Dr. K. Klabunde and Mr. R. Zoellner in preparing the starting materials and Dr. D. Mueller in obtaining 31P NMR spectra is gratefully acknowledged.Registry No. tra«s-Ru(dmpe)2Cl2, 19206-05-4; m-Ru(dmpe)2Cl2, 84172-85-0; t7wu-Ru(dmpe)2(H20)Cl+, 84130-50-7; trans-Ru-(dmpe)2(Me2SO)Cl+, 84130-51-8; [Ru2(Cl)3(PEt2Ph)6]Cl, 84130-52-9.