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Five-coordinate iridium(III) complex with ΔΛ chirality

delete2021-01-01
delete7
PRE
AI
K
Kazuyoshi Takimoto
Y
Yutaka Watanabe
J
Jun Yoshida
H
Hisako Sato *
DOI:10.1039/d1dt01960kdelete
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摘要

摘要

En 中文
The coordinatively unsaturated bis-chelated iridium(III) complex, [Ir(2-Bubzq)(2)Cl] (2-BubzqH = 2-butyl-benzo[h]quinoline), denoted as complex 1, was obtained by reacting iridium(iii) trichloride with 2-BubzqH in a 1 : 2 molar ratio. The results were in contrast to the common view that a chlorine-bridged dimer, [Ir(L)(2)Cl](2) (L = bis-chelate ligand), is formed under the corresponding conditions. A single-crystal X-ray diffraction structural analysis revealed that complex 1 has a five-coordinate geometry with a distorted square pyramidal configuration. The optical resolution of complex 1 was measured chromatographically on a chiral column, yielding Delta and Lambda as enantiomers. The resolved enantiomers were stable enough against racemization in CDCl3 as confirmed by the vibrational circular dichroism measurements. Complex 1 reacted with carbon monoxide (CO) to give [Ir(2-Bubzq)(2)(CO)Cl] and with 1,10-phenanthroline (phen) to give [Ir(2-Bubzq)(2)(phen)]Cl within a minute with its absolute configuration (Delta Lambda chirality) maintained.
Keyword:
VIBRATIONAL CIRCULAR-DICHROISM
ORTHO-METALATED COMPLEXES
SINGLE-CRYSTAL
PHOSPHORESCENT
IR(III)
LIGANDS
AGENTS
BONDS
RED

期刊

Dalton Transactions 封面图
Dalton Transactions
IF:
3.3
论文数:
3.3W
被引数:
7.5W

机构

E
Ehime University
学者数:
6.1K
论文数: 5.0K
被引数: 4.2K
N
Nihon University
学者数:
8.2K
论文数: 6.0K
被引数: 4.1K
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