Formation of novel chelating phosphine ligands via the reaction of [WCC<sub>6</sub>H<sub>4</sub>Me-4(CO)<sub>2</sub>(η-C<sub>5</sub>H<sub>5</sub>)] with the bidentate phosphine C<sub>6</sub>H<sub>4</sub>(PH<sub>2</sub>)<sub>2</sub>-1,2; X-ray crystal structures of the complexes [W{σ,η<sup>3</sup>-C<sub>6</sub>H<sub>4</sub>(PH<sub>2</sub>)(PC{OH}CH{C<sub>6</sub>H<sub>4</sub>Me-4})-1,2}(CO)(η-C<sub>5</sub>H<sub>5</sub>)], [{Wl{C<sub>6</sub>H<sub>4</sub>(PH<sub>2</sub>)(P{Me}C{O}CH<sub>2</sub>{C<sub>6</sub>H<sub>4</sub>Me-4})-1,2}(CO)(η-C<sub>5</sub>H<sub>5</sub>)·(]1/2C<sub>4</sub>H<sub>8</sub>O), and [WCo<sub>3</sub>(µ<sub>3</sub>-CR){µ-C<sub>6</sub>H<sub>4</sub>(PH<sub>2</sub>)(PC{OH}CH{C<sub>6</sub>H<sub>4</sub>Me-4})-1,2}(CO)<sub>9</sub>(η-C<sub>5</sub>H<sub>5</sub>)](R = H or Me)
作者:James E. Denison、John C. Jeffery、Suanna Harvey、Peter Müller、K. D. Vinindra Weerasuria
DOI:10.1039/c39900001023
日期:——
Treatment of the mononuclear alkylidyne complex [WCC6H4Me-4(CO)2(η-C5H5)] with one equivalent of the bidentate phosphine C6H4(PH2)2â1,2 affords the metalla-phosphine complex [WÏ,η3-C6H4(PH2)(PCOH}CHC6H4Me-4})-1,2}(CO)(η-C5H5)] which has an unused lone pair of electrons on the central phosphorus atom of the chelate ring and which undergoes P-methylation and, like a conventional PR3 ligand, will substitute CO ligands in transition metal complexes; the structures of the complexes [WÏ,η3-C6H4(PH2)(PCOH}CHC6H4Me-4})-1,2}(CO)(η-C5H5)], [WlC6H4(PH2)(PMe}CO}CH2C6H4Me-4})-1,2}(CO)(η-C5H5)]·(1/2C4H8O), and [WCo3(η3-CR)µ-C6H4(PH2)(PCOH}CHC6H4Me-4})-1,2}(CO)9(η-C5H5)](R = H or Me) have been determined by single crystal X-ray diffraction studies.
将单核烷基炔配合物[WCC6H4Me-4(CO)2(δ--C5H5)]与一个当量的双齿膦C6H4(PH2)2â1,2进行处理,可得到金属-膦配合物[WÏ,δ-3-C6H4(PH2)(PCOH}CHC6H4Me-4})-1、2}(CO)(δ--C5H5)],它在螯合环的中心磷原子上有一个未使用的孤对电子,会发生 P-甲基化反应,就像传统的 PR3 配体一样,可以替代过渡金属配合物中的 CO 配体;络合物[WÏ,δ-3-C6H4(PH2)(PCOH}CHC6H4Me-4})-1,2}(CO)(δ--C5H5)]、[WlC6H4(PH2)(PMe}CO}CH2C6H4Me-4})-1,2}(CO)(δ--C5H5)]Â-(1/2C4H8O)的结构、和[WCo3(δ-3-CR)µ-C6H4(PH2)(PCOH}CHC6H4Me-4})-1,2}(CO)9(δ--C5H5)](R = H 或 Me)已通过单晶 X 射线衍射研究确定。