Method for producing aromatic polymer

A method for producing an aromatic polymer comprising polycondensing an aromatic compound represented by the following general formula (I) in the presence of a nickel complex containing a phosphine compound represented by the following general formula (II),

• (wherein Ar denotes a divalent organic group having an aromatic ring which may include an oxygen atom and/or a nitrogen atom, R denotes a monovalent hydrocarbon group which may be substituted, a hydrocarbon oxy group which may be substituted, an amino group which is substituted by two not-substituted or substituted monovalent hydrocarbon groups, a hydrocarbon mercapto group which may be substituted, a hydrocarbon carbonyl group which may be substituted, a hydrocarbon oxycarbonyl group which may be substituted, an amino carbonyl group which is substituted by two not-substituted or substituted monovalent hydrocarbon groups, or a hydrocarbon sulfonyl group which may be substituted, k is an integer of 1 or more, when there are plural R, all R may be identical with each other or may be different from each other, and two R together may form a ring, X denotes a halogen atom, a nitro group, or a group represented by —SO3Q (wherein Q denotes a monovalent hydrocarbon group which may be substituted, Y denotes an oxygen atom, a sulfur atom, an imino group, a substituted imino group, an ethenylene group, a substituted ethenylene group, or an ethynylene group, n denotes 0 or 1, M denotes a hydrogen atom, —B(OQ1)2, —Si(Q2)3, —Sn(Q3)3, or —Z1(Z2)m, wherein (Q1 denotes a hydrogen atom or a monovalent hydrocarbon group, two Q1 may be identical with each other or may be different from each other, and two Q1 together may from a ring, Q2 denotes a monovalent hydrocarbon group, and three Q2 may be identical with each other or may be different from each other, Q3 denotes a monovalent hydrocarbon group, and three Q3 may be identical with each other or may be different from each other, Z1 denotes a metal atom or a metal ion, Z2 denotes a counter ion, and m is an integer of 0 or higher,
• wherein R1 denotes a monovalent hydrocarbon group which may be substituted, four R1 may be identical with each other or may be different from each other, and two R1 together may form a ring, and R2 denotes a divalent hydrocarbon group which may be substituted.