| abstract |
The present invention relates to a phosphonium compound represented by the following formula (1) [Chemical Formula 1] (Wherein R 1 , R 2 , R 3 and R 4 each independently represents a substituted or unsubstituted C 1 -C 30 aliphatic hydrocarbon group, a substituted or unsubstituted C6-C30 aromatic hydrocarbon group, or a hetero A substituted or unsubstituted C1 to C30 hydrocarbon group containing an atom, X and Y are not identical to each other and each independently represents a substituted or unsubstituted C1-C30 aliphatic hydrocarbon group, a substituted or unsubstituted C6-C30 aromatic hydrocarbon group, or a substituted or unsubstituted C1 C30 hydrocarbon group, l is an integer of 0 to 4, m is an integer of 1 to 6, and n is a number of 1 to 5). |