Phenyl nickel complexes with a chelating P,N ligand. Structures of Ph<sub>3</sub>PCHC(NPh)Ph and [NiPh{Ph<sub>2</sub>PCHC)NPh)Ph}-{Ph<sub>3</sub>PCHC(NPh)Ph-N}]
The complexes [[graphic omitted]Ph)Ph}Ph3PCHC(NPh)Ph-N}] and [[graphic omitted]Ph)Ph}(PR3)](PR3= PMe3, PMe2Ph or PMePh2) were prepared starting from [Ni(cod)2](cod = cycloocta-1,5-diene) and the phosphorus ylide Ph3PCHC(NPh)Ph I in the presence of a tertiary phosphine. Surprisingly, only the first complex was isolated when PPh3 and P(C6H11)3 were used, whereas the other phosphines led to the corresponding
[[省略图示] Ph)Ph} Ph 3 P CHC(NPh)Ph- N }]和[[省略图示] Ph)Ph}(PR 3)](PR 3 = PMe 3,PMe 2 Ph或PMePh 2)来自[镍(COD)制备的起始2 ](COD =环辛-1,5-二烯)和磷叶立德博士3 P CHC(NPH)PH我在叔膦的存在。出人意料的是,当使用PPh 3和P(C 6 H 11)3时,仅分离出第一个配合物,而其他膦则生成相应的PR 3。配合不同数量的第一个配合使用,具体取决于其空间需求。已知的I合成已经过优化,收率接近90%。为研究镍化合物作为乙烯低聚催化剂的潜力而进行的实验表明,化学计量地形成了苯乙烯和少量的低分子量线性α-烯烃。I和第一配合物的分子结构已经通过X射线衍射确定。在镍络合物中,金属周围的配位是扭曲的方形平面,P(1)–Ni–C(1)和N(1)–Ni–N(2)的角度分别为90.30(8)和97.18(8)°
Capuano, Lilly; Drescher, Stefan; Huch, Volker, Liebigs Annalen der Chemie, 1991, # 4, p. 331 - 334
作者:Capuano, Lilly、Drescher, Stefan、Huch, Volker
DOI:——
日期:——
Capuano, Lilly; Drescher, Stefan; Huch, Volker, Liebigs Annalen der Chemie, 1993, # 2, p. 125 - 130
作者:Capuano, Lilly、Drescher, Stefan、Huch, Volker
DOI:——
日期:——
The Wittig-type Reaction of O=C–, C=C–, and N=C–Substituted Methylenetriphenylphosphoranes with<i>N</i>-Sulfinyl-<i>p</i>-toluenesulfonamide. An Intramolecular 1,3-Dipolar Cyclization of Imidoylconjugated Thione<i>S</i>-Imides
The Wittig-type reactions of N-sulfinyl-p-toluenesulfonamide with (1) O=C–, (2) C=C–, and (3) N=C-conjugated phosphorus ylides were investigated. In the reaction with (1), N-sulfinyl-p-toluenesulfonamide reacted at both the ylide and the carbonyl moiety to form TsN=C-conjugated thione S-imide, which underwent intramolecular 1,3-dipolar cycloaddition of the CSN group with the aromatic C=C bond of the tosyl