Calcium complexes of noninnocent α-diimine ligands

Yanyan Liu; Yanxia Zhao; Xiao Juan Yang; Shaoguang Li; Jing Gao; Peiju Yang; Yana Xia; Biao Wu

doi:10.1021/om101139n

Calcium complexes of noninnocent α-diimine ligands

Yanyan Liu, Yanxia Zhao, Xiao Juan Yang^*, Shaoguang Li, Jing Gao, Peiju Yang, Yana Xia, Biao Wu

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

A series of calcium compounds with α-diimine ligands, [L ^-Ca-(μ₂-Cl)(THF)₂]₂ (1, L = L^iPr; 2, L = L^Mes), [(L^iPr)^2- ₂CaK₂(THF)]_n (3), [(L^Mes) ^2-Na(THF)₂]₂Ca (4), and [Ca(L ^iPr)^2-Li(THF)(μ₃-Cl)Li(THF) ₂(μ₃-Cl)]₂ (5), where L^iPr = [(2,6-ⁱPr₂C₆H₃)NC(Me)]₂ and L^Mes = [(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^- or L^2-) 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 3-5 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.

Original language	English
Pages (from-to)	1599-1606
Number of pages	8
Journal	Organometallics
Volume	30
Issue number	6
DOIs	https://doi.org/10.1021/om101139n
Publication status	Published - 28 Mar 2011
Externally published	Yes

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@article{32f338aea16e4d23a82098dc2639f73c,

title = "Calcium complexes of noninnocent α-diimine ligands",

abstract = "A series of calcium compounds with α-diimine ligands, [L -Ca-(μ2-Cl)(THF)2]2 (1, L = LiPr; 2, L = LMes), [(LiPr)2- 2CaK2(THF)]n (3), [(LMes) 2-Na(THF)2]2Ca (4), and [Ca(L iPr)2-Li(THF)(μ3-Cl)Li(THF) 2(μ3-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- or L2-) 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 3-5 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.",

author = "Yanyan Liu and Yanxia Zhao and Yang, {Xiao Juan} and Shaoguang Li and Jing Gao and Peiju Yang and Yana Xia and Biao Wu",

year = "2011",

month = mar,

day = "28",

doi = "10.1021/om101139n",

language = "English",

volume = "30",

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journal = "Organometallics",

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T1 - Calcium complexes of noninnocent α-diimine ligands

AU - Liu, Yanyan

AU - Zhao, Yanxia

AU - Yang, Xiao Juan

AU - Li, Shaoguang

AU - Gao, Jing

AU - Yang, Peiju

AU - Xia, Yana

AU - Wu, Biao

PY - 2011/3/28

Y1 - 2011/3/28

N2 - A series of calcium compounds with α-diimine ligands, [L -Ca-(μ2-Cl)(THF)2]2 (1, L = LiPr; 2, L = LMes), [(LiPr)2- 2CaK2(THF)]n (3), [(LMes) 2-Na(THF)2]2Ca (4), and [Ca(L iPr)2-Li(THF)(μ3-Cl)Li(THF) 2(μ3-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- or L2-) 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 3-5 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.

AB - A series of calcium compounds with α-diimine ligands, [L -Ca-(μ2-Cl)(THF)2]2 (1, L = LiPr; 2, L = LMes), [(LiPr)2- 2CaK2(THF)]n (3), [(LMes) 2-Na(THF)2]2Ca (4), and [Ca(L iPr)2-Li(THF)(μ3-Cl)Li(THF) 2(μ3-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- or L2-) 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 3-5 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.

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U2 - 10.1021/om101139n

DO - 10.1021/om101139n

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VL - 30

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JO - Organometallics

JF - Organometallics

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Calcium complexes of noninnocent α-diimine ligands

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