Synthesis, Characterization, and X‐ray Structures of Ru₃(CO)₉(dotpm)(L) Complexes [L = PPh₃, P(C₆H₄Cl‐p)₃, and PPh₂(C₆H₄Br‐p)]

Abstract

The reaction of Ru 3 (CO) 10 (dotpm) (1) [dotpm = (bis(diortho-tolylphosphanyl)methane)] and one equivalent of L [L = PPh 3 , P(C 6 H 4 Cl-p) 3 and PPh 2 (C 6 H 4 Br-p)] in refluxing n-hexane afforded a series of derivatives [Ru 3 (CO) 9 (dotpm)L] (2-4), respectively, in ca. 67-70 % yield. Complexes 2-4 were characterized by elemental analysis (CHN), IR, 1 H NMR, 13 C{ 1 H} NMR and 31 P{ 1 H} NMR spec-* Prof. Dr. O. B. Shawkataly Fax: +604-6576000 E-Mail: omarsa@usm.my [a] Chemical Sciences Programme troscopy. The molecular structures of 2, 3, and 4 were established by single-crystal X-ray diffraction. The bidentate dotpm and monodentate phosphine ligands occupy equatorial positions with respect to the Ru triangle. The effect of substitution resulted in significant differences in the Ru-Ru and Ru-P bond lengths.