Calcium Complexes of Noninnocent 伪-Diimine Ligands
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- 作者：Yanyan Liu ; Yanxia Zhao ; Xiao-Juan Yang ; Shaoguang Li ; Jing Gao ; Peiju Yang ; Yana Xia ; Biao Wu
- 刊名：Organometallics
- 出版年：2011
- 出版时间：March 28, 2011
- 年：2011
- 卷：30
- 期：6
- 页码：1599-1606
- 全文大小：986K
- 年卷期：v.30,no.6(March 28, 2011)
- ISSN：1520-6041
文摘
A series of calcium compounds with 伪-diimine ligands, [L鈭?/sup>Ca-(渭2-Cl)(THF)2]2 (1, L = LiPr; 2, L = LMes), [(LiPr)2鈭?/sup>2CaK2(THF)]n (3), [(LMes)2鈭?/sup>Na(THF)2]2Ca (4), and [Ca(LiPr)2鈭?/sup>Li(THF)(渭3-Cl)Li(THF)2(渭3-Cl)]2 (5), where LiPr = [(2,6-iPr2C6H3)NC(Me)]2 and LMes = [(2,4,6-Me3C6H2)NC(Me)]2, have been synthesized by the reaction of the lithium, sodium, or potassium salts of the reduced ligands (L鈭?/sup> or L2鈭?/sup>) with calcium chloride. Single-crystal X-ray diffraction analyses reveal that compounds 1 and 2 are isostructural dinuclear compounds bridged by chloride ions, compound 3 forms a left-handed 21 helical structure, while 4 features a metallocene-like structure, and 5 forms a laddered aggregate. The ligand exists as the doubly reduced dianionic form in 3鈭?b>5 and appears as the radical anion in compounds 1 and 2. The coordination modes of the alkali metal and calcium ions in these complexes are discussed.