The invention relates to a bridged bi-aromatic phenol ligand of formula (I) or (IX)

or

wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , R 9 , R 10 , R 11 , R 12 , R 13 and R 14 is independently selected from the group consisting of hydride, halide, optionally substituted hydrocarbyl, heteroatom-containing optionally substituted hydrocarbyl, alkoxy, aryloxy, silyl, boryl, dialkyl amino, alkylthio, arylthio and seleno; optionally two or more R groups can combine together into ring structures with such ring structures having from 3 to 100 non-hydrogen atoms in the ring; A is a bridging group having from one to 50 non-hydrogen atoms; Y and Y' are independently selected from O, S, NR a and PR a wherein R a is optionally substituted hydrocarbyl; Ar is optionally substituted aryl or optionally substituted heteroaryl, prepared by a method which comprises preparing the ligand from a compound containing at least one phenol moiety wherein the at least one phenol moiety remains unprotected during all steps of the method and the method comprises at least one step of aryl coupling.