Abstract
Compounds of composition trans, mer-[M(C 2H 4) 2(CNR)(PMe 3) 3] ( 1) and trans, trans, trans-[M(C 2H 4) 2(CNR) 2(PMe 3) 2] ( 2) for various combinations of M = Mo, W and R = CHMe 2, CMe 3 and C 6H 11, have been obtained by the stepwise reaction of trans-[M(C 2H 4) 2(PMe 3) 4] with the corresponding isocyanide. Compounds 2 can also be obtained by treatment of 1 with CNR, a reaction that allows the synthesis of the mixed isocyanide trans, trans-[Mo(C 2H 4) 2(CNCMe 3)(CNC 6H 11)(PMe 3) 2] ( 2g). A similar reaction, starting with trans, mer-[M(C 2H 4) 2(CO)(PMe 3) 3], produces the mixed isocyanide—carbonyl derivatives trans, trans-[M(C 2H 4) 2(CNR)(CO)(PMe 3) 2] ( 3). X-ray structural studies on complexes 2b and 3b (M = Mo, R = CMe 3) have been carried out. Both compounds are monoclinic, P 2 1/ n but while the structure of 3b has been refined to a conventional R value of 0.034 by using 2976 observed reflections (unit cell constants: a = 10.972(3), b = 18.923(4), c = 10.544(3) Å; β = 98.89(2)°) extensive disorder problems have prevented anisotropic refinement of 2b, and a final isotropic R value of 0.097 has been obtained. For compound 3b, the MoC bond distances are 1.959(5) (MoCO), 2.137(4) (MoCNR) and 2.283(9) Å (av. MOC 2H 4).
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.
