Transition metals disilene complexes with

Major advances in organometallic chemistry during the last years have been achieved in the area of silicon-metal multiple bonding and silicon with low coordination numbers. For late transition metals, new complexes have been synthesized such as silanediyl (A), silene (B), silaimine (C), disilene (D), silatrimethylenemethane (E), silacarbynes (F), cyclic silylenes (G), silacyclopentadiene (H) and metalla-sila-allenes (I) (Figure 3). 

Stable transition-metal complexes of tetramesityldisilene result upon irradiation with oxalato bis(tertiary phosphine) complexes of platinum87. The latter photofragment with loss of C02 to yield the 14-electron intermediate (R3P)2Pt, which then apparently adds to the disilene to yield 33 (R = Et or Ph) (equation 30). The two complexes were isolated in the form of air-sensitive orange-red oils and characterized by NMR and mass spectra. The structure of the triethylphosphine derivative was further secured by addition of methanol across the Pt-Si bond. 

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