Abstract
Tricarbonyl( N-cyanoazepine)metal(0) complexes of chromium ( 2a), molybdenum ( 2b) and tungsten ( 2c) are formed when tricarbonyl-tris(acetonitrile)chromium(0), -molybdenum(0) and -tungsten(0), respectively, are treated photochemically with N-cyanoazepine ( 1). The resulting complexes are purified. UV photolysis of Cr(CO) 3(η 6- N-cyanoazepine) ( 2a) and RCCR (R: Ph, SiMe 3) in toluene gives the [6+2]cycloadducts, tricarbonyl{η 4:2-7,8-diphenyl-9- N-cyano-9-azabicyclo[4.2.1]-nona-2,4,7-triene}chromium(0), [(η 4:2-C 8H 6N(CN)Ph 2)Cr(CO) 3] ( 3a) and tricarbonyl{η 4:2-7,8-bis(trimethylsilyl)-9- N-cyano-9-azabicyclo[4.2.1]-nona-2,4,7-triene}chromium(0), [(η 4:2-C 8H 6N(CN)(SiMe 3) 2)Cr(CO) 3] ( 3b). Like 2a– c, these new bicyclic compounds were purified by chromatography, recrystallized and isolated as analytically pure crystalline solids in moderate yields and characterized by mass, IR and NMR spectroscopy. The heterobicyclotrienes ( 4a, b) are isolated from ( 3a, b) by treatment with cerium(IV) ammonium nitrate (R=SiMe 3) or by heating in toluene (R=Ph).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.