| 摘要 |
Novel phosphinites and phosphonites of general formula: <IMAGE> where R2 is an electron-donating substituent, R1 and R3 are electron-donating substituents or hydrogen atoms, provided that they are not both hydrogen atoms, or either R1 or R3 forms part of a fused alicyclic ring with R2, R is alkyl or cycloalkyl, and n and m are integers, each being either 1 or 2, provided that (m+n) equals 3, and when n is 2, the substituents on each aromatic ring may be the same or different, and their use as catalysts for the dimerisation of acrylonitrile to give predominantly straight-chain C6 dimers.
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