Wikipedia
POCOP
POCOP is a popular type of pincer ligand. Pincer type ligands are tridentate ligands that bind three sites on one plane of a metal complex. POCOP forms complexes with one M-C( aryl) bond and two phosphinite ligands. The term POCOP is used both for the ligand, with formula CH(OPPh), and its complexes, with formula CH(OPPh)] (Ph = CH)