215815-01-3Relevant academic research and scientific papers
Synthesis and characterization of homologous nickel(II) and palladium (II) complexes with biphosphine monoxide ligands Ph2P(CH2)nP(O)Ph2 (n=1-3) and pTol2P(CH2)P(O)pTol2
Brassat, Ingo,Englert, Ulli,Keim, Wilhelm,Keitel, Dagmar P.,Killat, Stefan,Suranna, Gian-Paolo,Wang, Ruimin
, p. 150 - 162 (2008/10/08)
A series of cationic nickel complexes [(η3-methallyl)Ni(P∧P(O))]SbF6 (1-4) [P∧P(O) =Ph2P(CH2)P(O)Ph2 (dppmO) (1), Ph2P(CH2)2P(O)Ph2 (dppeO) (2), Ph2P(CH2)3P(O)Ph2 (dpppO) (3), pTol2P(CH2)P(O)pTol2 (dtolpmO) (4)] has been synthesized in good yields by treatment of [(η3-methallyl)NiBr]2 with biphosphine monoxides and AgSbF6. The ligands are coordinated in a bidentate way. Starting from [(η3-all)PdI]2 the cationic complexes [(η3-all)Pd(P∧P(O))]Y (8-14), [P∧P(O) = dppmO, dppeO, dpppO, dtolpmO;Y = BF4, SbF6, CF3SO3, pTolSO3] were synthesized in good yields. The coordination mode of the ligand is dependent on the backbone and the anion, revealing a monodentate coordination with dppmO for stronger coordinating anions. The intermediates [(η3-all)Pd(I)(P∧P(O)-K1-P)] (5-7) [P∧P(O) = dppmO (5), dppeO (6), dtolpmO (7)] were isolated and characterized. Neutral methyl complexes [(Cl)(Me)Pd(P∧P(O))] (15-18), [P∧P(O) = dppmO (15), dppeO (16), dpppO (17), dtolpmO (18)] can easily be obtained in high yields starting from [(cod)PdCl2]. For dppmO two different routes are presented. The structure of [(Me)(Cl)Pd{Ph2P(CH2)-P(O)Ph2-K 2-P,O}] ·CH2Cl2 (15) with the chlorine atom trans to phosphorus was determined by X-ray diffraction.
