Abstract
The successive reaction of chromium and tungsten hexacarbonyl, (CO) 6M (M = Cr, W), with [NC(Ph)R] − and [Et 3O]BF 4 yields the alkylideneamino(ethoxy)carbene complexes (CO) 5M[C(OEt)NC(Ph)R] (M = Cr ( 1), W ( 2); R = NMe 2 ( a), tBu ( b)). Ethoxide abstraction from 1 and 2 affords 2-azoniaallenylidene complexes, {(CO) 5M[CNC(Ph)R]} +BF 4 − ( 3/4). The complexes 3 and 4 are best described as resonance hybrids of several limiting structures. On the basis of the spectroscopic data of the complexes 3a and 4a the limiting structure of an iminium-substituted isocyanide complex dominates.
Sign-in/Register to access full text options 
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
