Isolation and electronic structures of derivatized manganocene, ferrocene and cobaltocene anions.

Isolation and electronic structures of derivatized manganocene, ferrocene and cobaltocene anions.
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DOI:
10.1038/s41557-020-00595-w
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发表时间:
2021-03
期刊:
影响因子:
21.8
通讯作者:
Mills DP
Mills DP
中科院分区:
化学1区
文献类型:
--
作者:
Goodwin CAP;Giansiracusa MJ;Greer SM;Nicholas HM;Evans P;Vonci M;Hill S;Chilton NF;Mills DP

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近70年前二茂铁的发现标志着茂金属化学的起源;尽管不久之后就发现了二茂铁阳离子,但直到2016年才分离出衍生型二茂铁的存在,只有在低温电化学研究中才观察到二茂铁的单阴离子。在这里,我们报道了固体中衍生的二茂铁阴离子的分离,作为3D金属配位体等结构家族的一部分,该家族由夹在两个大块Cptttligand(其中Cptttis{1,2,4-C5H2tBu3})之间的金属中心(锰、铁或钴)的阴离子络合物组成。这些对空气和温度敏感的络合物在-30°C以上迅速分解,然而,我们能够通过广泛的物理技术和从头计算来表征所有的茂金属化合物。这些数据使我们能够绘制这个茂金属离子家族的电子结构图,包括19E衍生的二茂铁阴离子的意外高自旋S=3/2基态。
The discovery of ferrocene nearly 70 years ago marked the genesis of metallocene chemistry; although the ferrocenium cation was discovered soon afterwards, a derivatized ferrocenium dication was only isolated in 2016 and the monoanion of ferrocene has only been observed in low temperature electrochemical studies. Here we report the isolation of a derivatized ferrocene anion in the solid state as part of an isostructural family of 3d metallocenates which consist of anionic complexes of a metal centre (manganese, iron or cobalt) sandwiched between two bulkyCptttligands (where Cptttis {1,2,4-C5H2 tBu3}). These air- and thermally-sensitive complexes rapidly decompose above -30 °C, however, we were able to characterise all metallocenates by a wide range of physical techniques and ab initio calculations. These data have allowed us to map the electronic structures of this metallocenate family, including an unexpected high-spin S = 3/2 ground state for the 19e-derivatized ferrocene anion.
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发表时间: 2019-02-13
影响因子: 15
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