Poly(ester)carbonate and method for producing poly(ester)carbonate

A method of producing a poly(ester)carbonate, comprising subjecting a diol and a carbonate ester to a transesterification reaction in the presence of a catalyst, wherein the catalyst comprises aluminum or a compound thereof, and a phosphorus compound, and

• wherein the phosphorus compound is selected from the group consisting of diethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate and diethyl p-methylbenzylphosphonate, and
• wherein the poly(ester)carbonate comprises 50 mol % or more of a stereostructural component unit based on all units, and the stereostructural component unit comprises a repeating unit derived from a compound represented by the following formula (A):
• wherein:
• the rings Z are each independently an aromatic group or a fused polycyclic aromatic group, each of Ra and Rb independently is a hydrogen atom, a halogen atom or a hydrocarbon group having a carbon number of 1 to 12 or a carbon number of 1 to 20, which optionally contain an aromatic group, each of Ar1 and Ar2 is a hydrogen atom or an aromatic group having a carbon number of 6 to 10, which optionally contain a substituent, each of L1 an L2 independently is a divalent linking group, m is 1, and n is 1.