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DOI: 10.1039/A702830J (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1997, 2837-2842

Di-, hexa- and poly-nuclear molybdenum(II) carboxylates containing quadruply bonded [Mo2]4+ units: crystal structures of [Mo2(O2CCHF2)2(bpy)2 (MeCN)(BF4)][BF4] and [Mo6(O2CCHF2)12(bpy)4 ] (bpy = 2,2′-bipyridine)

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Elizabeth F. Day, John C. Huffman, Kirsten Folting and George Christou

Abstract

The reaction of [Mo2(O2CMe)4] with an excess of CHF2CO2H resulted in the formation of [Mo2(O2CCHF2)4]·MeCN 1. Treatment of 1 with Et3O+ gave [Mo2(O2CCHF2)2(MeCN)4 ][BF4]2 2, which was converted into [Mo2(O2CCHF2)2(bpy)2 (MeCN)(BF4)][BF4] 3 on addition of 2,2′-bipyridine (bpy). The reaction of 1 and 3 (1∶2) in the presence of CHF2CO2- gave the `trimer-of-dimers' complex [Mo6(O2CCHF2)12(bpy)4 ] 4 in which two [Mo2(O2CCHF2)4(bpy)2 ] units are the two axial ligands to a central [Mo2(O2CCHF2)4] unit. The related reaction of 1 and 3 at a 1∶1 ratio in the presence of CHF2CO2- gave [Mo4(O2CCHF2)8(bpy)2 ]n 5, which was concluded to be a one-dimensional polymer consisting of alternating [Mo2(O2CCHF2)4(bpy)2 ] and [Mo2(O2CCHF2)4] units identical to those in 4.

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