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Palladium Complexes of Methylene-Bridged P-Stereogenic, Unsymmetrical Diphosphines
Organometallics ( IF 2.5 ) Pub Date : 2020-06-23 , DOI: 10.1021/acs.organomet.0c00283
Javier C. Córdoba 1 , Anton Vidal-Ferran 1, 2, 3 , Mercè Font-Bardia 4 , Arnald Grabulosa 1, 2
Affiliation  

Optically pure P-stereogenic methylphosphine–boranes P(BH3)PhArMe (Ar = 1-naphthyl (1-Np), 9-phenanthryl (1-Phen), 2-biphenylyl (1-Biph)) have been used to prepare six diphosphines of the type PPhAr–CH2–PR2 (R = Ph or i-Pr; 3-ArR) with a methylene bridge between the phosphorus atoms and a single P-stereogenic moiety. The ligands have been reacted with [PdCl2(COD)] to furnish the corresponding [PdCl2(P–P′)] complexes. The reaction with [PdCl(η3-2-methylallyl)]2 and NH4PF6 has produced the expected [Pd(η3-2-methylallyl)(P–P′)]PF6 complexes as stable species in solution only for the ligands containing the diisopropylphosphino group. The other ligands produced a mixture of species in solution, from which the dimeric complex [Pd23-2-methylallyl)2(PNpPh-CH2-PPh2)2](PF6)2, and the coordination compound [Pd(PBiphPh-CH2-PPh2)2](PF6)2 could be crystallographically characterized.

中文翻译:

亚甲基桥连的P-立体异构,不对称二膦的钯配合物

光学纯的P-立体异构甲基膦-硼烷P(BH 3)PhArMe(Ar = 1-萘基(1-Np),9-菲基(1-Phen),2-联苯基(1-Biph))已用于制备六种PPhAr–CH 2 –PR 2类型的二膦(R = Ph或i -Pr ; 3-ArR),在磷原子和单个P-立体异构部分之间具有亚甲基桥。配体已经与[PdCl 2(COD)]反应,得到了相应的[PdCl 2P-P')]复合物。与反应[的PdCl(η 3 -2-甲基烯丙基)] 2和NH 4 PF 6产生了预期[将Pd(η 3 -2-甲基烯丙基)(P-P')] PF 6种配合物作为在仅含有二异丙基团的配位体溶液中是稳定的物种。所述其他配体产生的溶液中的物质的混合物,从该二聚络合物[钯2(η 3 -2-甲基烯丙基)2(PNpPh-CH 2 -PPh 22 ](PF 62,和所述配位化合物[ Pd(PBiphPh-CH 2 -PPh 22 ](PF 62 可以在晶体学上表征。
更新日期:2020-07-13
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