Syntheses and solid state structures of cyclic diynes with two chalcogen centres ? a competition between weak interactions
作者:J. Hilko Schulte、Daniel B. Werz、Frank Rominger、Rolf Gleiter
DOI:10.1039/b303653g
日期:——
Structural investigations by means of X-ray diffraction reveal for most systems a chair-like conformation in the solidstate. For 5S(2)2, 5S(2)3, 7S(2)5, 5Se(2)2 and 5Te(2)3 tubular structures were encountered. These structures can be traced back to weak XX or weak C-Hpi interactions.
Structural Properties of Bis(hexacarbonyldicobalt) Complexes with Heteroatoms Next to the Former Triple Bonds − A Contribution to the Mechanism of the Pauson−Khand Reaction
作者:Daniel B. Werz、J. Hilko Schulte、Bernhard J. Rausch、Rolf Gleiter、Frank Rominger
DOI:10.1002/ejic.200300862
日期:2004.6
The bis(hexacarbonyldicobalt) complexes of cyclic diynes with sila-, thia- and selena-substituted acetylene units have been isolated. The structural features of these complexes have been elucidated by means of X-ray diffraction analyses on single crystals. In three cases (24′, 25′ and 29′) the X-ray investigations show bis(pentacarbonyldicobalt) complexes instead of bis(hexacarbonyldicobalt) ones.