CARBONYLNIOBIUM CHEMISTRY. IX. DERIVATIVES OF - AND , STABILIZED BY OLIGODENTATE PHOSPHINES

Article abstract of DOI:10.1016/0022-328X(84)80629-4

UV induced CO substitution in by Ph2P(CH2)2PPh2 (p2), PhP(CH2CH2PPh2)2 (p3) or P(CH2CH2PPh2)3 (pp3), L, yields cis- via .Only chelate-5 ring structures are observed.The carbonylniobates are converted on silica gel into , and .IR, 1H, 31P and 93Nb NMR spectral data are presented and there is 1H and 31P NMR evidence for a rigid structure of below 200 K.