Abstract
Compounds that contain an unbridged WW bond can be prepared through bimolecular decomposition of various imido alkylidene complexes. One type of WW species is [W(NR)(CH2-t-Bu)(OR‘)]2 (R = 2,6-dimethylphenyl (Ar‘) or 2,6-diisopropylphenyl (Ar); R‘ = pentafluorophenyl or hexafluoroisopropyl), which is found in both heterochiral and homochiral forms. The other type is [W(NR)(OR‘)2]2 (R‘ = trifluoro-tert-butyl or hexafluoro-tert-butyl). All species contain an unbridged W(IV)/W(IV) double bond with a WW bond distance of 2.4−2.5 A, a 90° angle between the imido ligands and the WW bond, and an anti relationship of the imido ligands. There is no indication that WW bonds are broken spontaneously; for example, heterochiral and homochiral [W(NR)(CH2-t-Bu)(OR‘)]2 species do not interconvert.
Paper version not known (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call