Si-4(4-) in Solution - First Solvate Crystal Structure of the Ligand-free Tetrasilicide Tetraanion in Rb1.2K2.8Si4 center dot 7NH(3)

Lorenz Corinna; Gaertner Stefanie; Korber Nikolaus

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Si-4(4-) in Solution - First Solvate Crystal Structure of the Ligand-free Tetrasilicide Tetraanion in Rb1.2K2.8Si4 center dot 7NH(3)

机译：Si-4（4-）溶液 - Rb1.2K2.8Si4中心点7NH（3）中无配体四硅化物四阴离子的第一溶剂化物晶体结构

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We report the first solvate structure of the silicide anion Si-4(4-), which provides circumstantial evidence of the stability of the highly charged anion in liquid ammonia solutions. The solvate Rb(1.2)K(2.8)Si(4)7NH(3) crystallized from a mixture of the ternary compound K6Rb6Si17 with the transition metal complex (C6H5)(3)P(2)Ni(CO)(2) bis(triphenylphosphine)dicarbonylnickel in the presence of the chelating agents 18-crown-6 (1,4,7,10,13,16-hexaoxacyclooctadecane) and 2.2.2cryptand (4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo8.8.8hexacosane) in liquid ammonia. Single X-ray diffraction analysis confirms the presence of the Si-4(4-) anion in the crystal structure of Rb(1.2)K(2.8)Si(4)7NH(3), which represents the first solvate compound of the naked tetrasilicide tetraanion. All five crystallographically independent cation positions show mixed occupancy by Rb+ and K+.

机译：我们报道了硅化物阴离子Si-4（4-）的第一个溶剂化物结构，这为高电荷阴离子在液氨溶液中的稳定性提供了间接证据。溶剂化物Rb（1.2）K（2.8）Si（4）7NH（3）由三元化合物K6Rb6Si17与过渡金属配合物[（C6H5）（3）P]（2）Ni（CO）（2）[双（三苯基膦）二羰基镍]在螯合剂18-冠-6（1,4,7,10,13,16-六氧杂环十八烷）和[2.2.2]隐秘物（4,7,13,16,21,24-六氧杂-1,10-二氮杂双环[8.8.8]二十二烷）在液氨存在下结晶。单次X射线衍射分析证实了Rb（1.2）K（2.8）Si（4）7NH（3）晶体结构中存在Si-4（4-）阴离子，这是裸四硅化物四阴离子的第一个溶剂化物化合物。所有五个晶体学上独立的阳离子位置都显示出 Rb+ 和 K+ 的混合占据。

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来源
《Zeitschrift fur Anorganische und Allgemeine Chemie》 |2017年第2期|141-145|共5页
作者
Lorenz Corinna; Gaertner Stefanie; Korber Nikolaus;
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作者单位

Univ Regensburg, Inst Anorgan Chem, Univ Str 31, D-93053 Regensburg, Germany;

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原文格式 PDF
正文语种英语
中图分类化学;
关键词
Silicon; X-ray diffration; Zintl anions; Liquid ammonia;

机译：硅;X射线衍射;锌阴离子;液氨;

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Si-4(4-) in Solution - First Solvate Crystal Structure of the Ligand-free Tetrasilicide Tetraanion in Rb1.2K2.8Si4 center dot 7NH(3)

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