Tripod-Liganden mit zwei verschiedenen Donorgruppen: Synthese und Koordinationsverhalten von H₃CCH(CH₂PPh₂)₂(CH₂OH) / Tripod Ligands with Two Different Donor Groups: Synthesis and Coordination of H₃CC(CH₂PPh₂)₂(CH₂OH)

Abstract

Abstract Starting from pentaglycerin, H 3 CC(CH 2 OH) 3 , a convenient three step synthesis of the tri­pod ligand H 3 CC(CH 2 PPh 2 ) 2 (CH 2 OH) (3) (abbreviated as PPO(H)) is described and its struc­ture is established by the usual analytical methods as well as by X-ray analysis. The ligand behaves as a bidentate donor towards nickel(II) as shown by the formation and X-ray analysis of the complex {PPO(H)}NiBr 2 (4). In the square planar complex 4 only the PPh 2 groups are coordinated. In the tetrahedral complex [{PPO(H)} 2 Ni](BF 4 ) 2 (5) two PPO(H) ligands sur­round nickel as bidentate ligands.