Reductive Cyclotetramerization of CO to Squarate by a U(III) Complex: The X-ray Crystal Structure of [(U (η-C<sub>8</sub>H<sub>6</sub>{Si<i><sup>i</sup></i><sup></sup>Pr<sub>3</sub>-1,4}<sub>2</sub>)(η-C<sub>5</sub>Me<sub>4</sub>H)]<sub>2</sub>(μ-η<sup>2</sup>: η<sup>2</sup>-C<sub>4</sub>O<sub>4</sub>)
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https://figshare.com/articles/dataset/Reductive_Cyclotetramerization_of_CO_to_Squarate_by_a_U_III_Complex_The_X_ray_Crystal_Structure_of_U_C_sub_8_sub_H_sub_6_sub_Si_i_sup_i_sup_i_sup_sup_Pr_sub_3_sub_1_4_sub_2_sub_C_sub_5_sub_Me_sub_4_sub_H_sub_2_sub_sup_2_sup_sup_2_sup_C_sub_4_sub_O_sub_4_s/3067633数据链接链接失效反馈
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资源简介：
The U(III) mixed-sandwich compound [U(η-C5Me4H)(η-C8H6{SiiPr3-1,4}2)(THF)] 1 may be prepared by sequential reaction of UI3 with K[C5Me4H] in THF followed by K2[C8H6{SiiPr3-1,4}2]. 1 reacts with carbon monoxide at −30 °C and 1 bar pressure in toluene solution to afford the crystallographically characterized dimer [(U(η-C8H6{SiiPr3-1,4}2)(η-C5Me4H)]2(μ−η2: η2−C4O4) 2, which contains a bridging squarate unit derived from reductive cyclotetramerization of CO. DFT computational studies indicate that addition of a 4th molecule of CO to the model deltate complex [U(η-COT)(η-Cp)]2(μ−η: η−C3O3)] to form the squarate complex [U(η-COT)(η-Cp)]2(μ−η2: η2−C4O4)] is exothermic by 136 kJ mol-1.
创建时间：
2016-03-01
