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The Reaction of Potassium Polyselenides with [CpW(CO) 3 Cl] in DMF ‐ Formation and Crystal Structure of [CpW(CO) 3 SeC(O)NMe 2 ] and {[CpW(CO) 3 ] 2 Se 4 }
Author(s) -
Jones Peter G.,
Laube Jörg,
Thöne Carsten
Publication year - 1998
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199803)1998:3<397::aid-ejic397>3.0.co;2-u
Subject(s) - chemistry , crystallography , crystal structure , potassium , bond length , selenium , ligand (biochemistry) , stereochemistry , organic chemistry , biochemistry , receptor
The reactions of the potassium polyselenides „K 2 Se 6 ” and „K 2 Se 8 ” with [CpW(CO) 3 Cl] and 18‐crown‐6 in DMF lead to a mixture of the selenido complexes {[CpW(CO) 3 ] 2 Se 4 } 1 and [(18‐crown‐6)K] + [CpW(Se 4 ) 2 ] − 3 and the Se−bonded selenocarbamato complex [CpW(CO) 3 SeC(O)NMe 2 ] 2 in yields depending on the selenium content of the used potassium polyselenides („K 2 Se 6 ” or „K 2 Se 8 ”). A similar reaction in THF produces {[CpW(CO) 3 ] 2 Se 4 } as the main product. X‐ray structures of 1 and 2 were determined. In 1 the Se 4 ‐chain is bonded in a μ 2 ‐η 1 fashion, with corresponding W−Se bond lengths of 264.0(1) and 264.3(1) pm. The Se−Se bond lengths lie in the range 232 to 237 pm. The first example of an η 1 Se‐bonded selenocarbamato ligand is observed in the crystal structure of 2 , with a W−Se bond length of 263.1(1) pm. The 77 Se‐NMR data are compared with the corresponding data of related complexes.