The 3,5-di-tert-butylpyrazolato (3,5-tBu(2)pz) derivatives of aluminum [(eta (1),eta (1)-3,5-tBu(2)pz)(mu -Al)R1R2](2) (R-1 = R-2 = Me 1; R-1 = R-2 = Et, 2; R-t = R-2 Cl, 3; R-1 = R-2 = I, 4; [(eta (2)-3,5-tBu(2)pz)(3)Al], 5; [Al-2(eta (1),eta (1)-3,5-tBu(2)pz)(2)-(mu -E)(C equivalent to CPh)(2)] (E = S (6), Se (7), Te (8)) have been prepared in good yield. Compounds 1 and 2 were obtained by the reactions of H[3,5-tBu(2)pz] with Me3Al and Et3Al, respectively. Reaction of [(eta (1),eta (1)-3,5-tBu(2)pz)(mu -Al)H-2](2) with the pyrazole H[3,5-tBu(2)pz] gave [(eta (2)-3,5-tBu(2)pz)(3)Al] (5). The reaction of [(eta (1),eta (1)-3,5-tBu(2)pz)(mu -Al)H-2](2) (R = H, Me) and It yielded 4, while the reaction of 1 equiv of K[3,5-tBu(2)pz] and AlCl3 afforded 3. In addition, the reaction of [Al-2(eta (1),eta (1)-3,5-tBu(2)pz)(2)(mu -E)H-2] and HC equivalent to CPh gave 6, 7, and 8. All compounds have been characterized by elemental analysis, NMR, and mass spectroscopy. The molecular structure analyses of compounds 1, 3, 6, and 7 by X-ray crystallography showed that complexes 1 and 3 are dimeric with two eta (1),eta (1)-pyrazolato groups in twisted conformation while 6 and 7 with two eta (1),eta (1)-pyrazolato groups display a boat conformation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据