Transition metal complexes of divalent group 14 element ligands (tetrylenes) have been studied for 40 years. In contrast to carbenes, heavier element tetrylenes possess a different ground state and therefore exhibit different reactivity. However, their transition metal complexes possess the common feature of group 14 element transition metal bonds.In contrast, the reactions of the tetrylenes Ge(SArMe6)2 (ArMe6 = C6H3-2,6(C6H2-2,4,6-Me3)2), and Sn(SArMe6)2 with molybdenum carbonyl norbornadiene complexes gave three new, unexpected transition metal germylene and stannylene complexes which display no Ge/Sn-Mo bonding. Instead, the compounds feature bonding between the molybdenum and the tetrylene thiolato substituents. The complexes were chacterized by 1H, 13C and 119Sn NMR spectroscopy as well as by X-ray crystallography. The peculiarities that result from the unusual coordination mode will be discussed.

Unusual coordination of tetrylenes to molybdenum carbonyl fragments

248th National Meeting (2014)

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