Selenocarbonyl complexes preparation

Cyclooctene complexes [Mcp(CO)2 (cyclooctene)] are utilized for preparation of thiocarbonyl and selenocarbonyl complexes [see reactions (2.176) and (2.177) ... 

Studies on the chemistry of selenocarbonyl compounds have been increasingly reported din ing the past decade. Initially, the focus had been mainly on the development of new synthetic methods for the preparation of selenocarbonyl compoimds. The various achievements have allowed the evaluation of a wide range of applications. X-ray molecular structures of some derivatives have been disclosed. Selenocarbonyl compoimds that are relatively stable but still retain high reactivity have exhibited unique reactions. The present review outlines the characteristic features of selenocarbonyl compounds. Their syntheses and reactions are classified on the basis of reaction patterns rather than the substituents adjacent to selenocarbonyl group. Several types of metal complexes having selenocarbonyl groups are described as well. 

Thiocarbonyl and selenocarbonyl metal complexes are generally prepared from carbon disulfide, CS2 thiophosgene, CSCI2 and carbon diselenide, CSc2, as well as from transition metal complexes such as metal carbonyls. Commonly, triphenyl-phosphine is utilized to eliminate sulfur or selenium ... 

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