Synthesis and Reactivity of Doubly Bridged μ-η<sup>5</sup>:η<sup>7</sup>-Cyclopentadienylcycloheptatrienyl Dimolybdenum Complexes
作者:Matthias Tamm、Kim Baum、Roland Fröhlich、Pauli Saarenketo
DOI:10.1021/om000977c
日期:2001.4.1
The reaction of tropylium tetrafluoroborate, (C7H7)BF4, with lithium cyclopentadienides afforded isomeric mixtures of dihydrosesquifulvalenes ((1,3,5-cycloheptatrien-7-yl)cyclopentadienes) of the type C5H3RR‘−C7H7 (1a, R = R‘ = tert-butyl; 1b, R = tert-butyl, R‘ = H; 1c, R = R‘ = H). Lithiation of the hydrocarbons 1a−c followed by reaction with [(CH3CN)3Mo(CO)3], oxidation with iodine, and hydride
四氟硼酸对苯二甲酸钾(C 7 H 7)BF 4与环戊二烯化锂反应,得到C 5 H 3 RR'-C型二氢倍半富烯((1,3,5-环庚三烯-7-基)环戊二烯)的异构体混合物7 H 7(1a,R = R′=叔丁基;1b,R =叔丁基,R′= H;1c,R = R′= H)。烃1a - c的锂化,然后与[(CH 3 CN)3 Mo(CO)3]氧化,用碘和三苯基使用四氟硼酸氢化物提取,(PH 3 C)BF 4,导致强烈着色sesquifulvalene复合物的形成[(η 5 -2,4-吨-Bu 2 ç 5 ħ 2 -C 7 ħ 6)的Mo(CO)3 I] BF 4(图2a),[(η 5 -3-吨-BuC 5 ħ 3 -C 7 ħ 6)的Mo(CO)3 I] BF 4(图2b),和[(η 5 -C5 H 4 -C 7 H 6)Mo(CO)3 I] BF 4(2c)。由于差的溶解性和稳定性的图2c,与芳香烃交换反应[(η