Abstract
The ditopic aminodiphosphines CH 2(4,4′-Ph 2PNHC 6H 4) 2 ( 2) and CH 2(4,4′-Ph 2PCH 2NHC 6H 4) 2 ( 5) are obtained by reaction of 4,4′-diaminodiphenylmethane with ClPPh 2 and (i) (CH 2O) n /NaOMe/(ii) HPPh 2, respectively. Treatment of (η 4-nbd)Mo(CO) 4 with 2 and 5 under high-dilution conditions in CH 2Cl 2 affords the tetraazatetraphosphadimolybdaclophanes [CH 2(4,4′-(OC) 4Mo(Ph 2PNHC 6H 4) 2)] 2 ( 3) and [CH 2(4,4′-(OC) 4Mo(Ph 2PCH 2NHC 6H 4) 2)] 2 ( 6) in relatively high yields. The structures of 3 and 6 were investigated by X-ray crystal-structure analyses. Whereas the cavity of the molecular structure of 3 can be described by a parallelogram, that of 6 has the shape of a boat in which the diphenylmethane building blocks form the hull and the cis-(Ph 2P) 2Mo(CO) 4 fragments represent the bow and stem, respectively. Because of the formation of only very weak hydrogen bonds in 3 and 6, no binding to molecules like p-benzoquinone, 1,4-cyclohexanedione, 2,5-piperazinedione and trans-1,4-diaminocyclohexane could be detected.
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