A Mononuclear Iron(II) Bis(guanidinate) Complex: Synthesis, Structure, and Reactivity

Wong, Gloria H Y; Yeung, Lai Fong; Tsoi, Ho; Chan, Hoi‐Shan; Chiang, Ming‐Hsi; Lee, Hung Kay

doi:10.1002/ejic.201800815

Cited by 5 publications

References 38 publications

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A Series of Low‐Coordinate Iron Selenido Complexes: Reactivity of a Linear Iron(I) Silylamide towards Selenium

2023

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A variety of different low‐coordinate iron selenide complexes is reported. These are obtained by reaction of the linear iron(I) silylamide K{18c6}[Fe(N(Dipp)SiMe3)2] (Dipp=2,6‐diisopropylphenyl) with red selenium. Careful adjustment of the reaction conditions results in the formation of unique low‐coordinate selenido iron complexes, namely a monoselenide bridged [2Fe−1Se]2+ complex, as well as mononuclear iron per‐ and triselenides. Further, C−H bond activation of one of the silylamide ligands by a putative terminal iron monoselenide is observed.

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A Series of Low‐Coordinate Iron Selenido Complexes: Reactivity of a Linear Iron(I) Silylamide towards Selenium

2023

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Main group metal coordination chemistry

Housecroft

Constable²

2023

Comprehensive Inorganic Chemistry III

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Lithium and Dilithium Guanidinates, a Starter Kit for Metal Complexes Containing Various Mono- and Dianionic Ligands

et al. 2020

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Comparative studies of the synthesis of lithium guanidinates via nucleophilic addition of lithium amides to carbodiimides were performed. Four combinations of small or sterically crowded carbodiimide and sterically crowded lithium amide or lithium amide containing an adjacent amino donor group give ten different types of complexes. In particular, 2,6-[(CH 3 ) 2 CH] 2 C 6 H 3 NHLi (DipNHLi, 1) reacts with (CH 3 ) 2 CHNCNCH(CH 3 ) 2 upon the formation of the dissymmetric dimeric complex 2 with four-coordinate Li atoms. In contrast, 1 with DipNCNDip gives the mononuclear lithium guanidinate 3 with two-coordinate lithium by κ 1 -guanidinate, solvent molecule, and additional interaction with a π-electron cloud of one of the Dip groups. Analogous reactions of 2-[(CH 3 ) 2 NCH 2 ]-C 6 H 4 NHLi (7) yield complexes 8 and 9, where the adjacent amino donors are always coordinated. Further deprotonation of 2, 3, 8, and 9 leads to dilithium guanidinates(2−)4, 5, 10, and 11, among which only 5, containing three Dip groups, is monomeric with contacts to two π-electron systems of Dip groups. The rest of the complexes are tetranuclear with different structural patterns. In the central parts of molecules, toward which the nitrogen atoms of the guanidinates are oriented, lithium atoms are usually pseudotetrahedral, but trigonal in peripheral parts. Adjacent solvent molecules, chelating amino groups, and π-electron systems of Dip groups are coordinated in order to complete coordination polyhedra. Complexes 4 and 5 deoligomerize in solution upon the formation of fluxional monomeric dilithium species. Conversely, 11 is a dimer in solution due to the strong donation of an amino group. The silylated lithium amide {2-[(CH 3 ) 2 NCH 2 ]C 6 H 4 }[(Si(CH 3 ) 3 ]NLi (12) reacts with both carbodiimides to give dinuclear 13 obtained from diisopropylcarbodiimide and monomeric 14 from the second carbodiimide. Complexes 13 and 14 structurally resemble 8 and 9, with the highest degree of the localization of π-electron density within the N 3 C guanidinate system, η 3 -contact to the Dip ring, and a lack of the solvent molecule in 14.

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A Mononuclear Iron(II) Bis(guanidinate) Complex: Synthesis, Structure, and Reactivity

Cited by 5 publications

References 38 publications

A Series of Low‐Coordinate Iron Selenido Complexes: Reactivity of a Linear Iron(I) Silylamide towards Selenium

A Series of Low‐Coordinate Iron Selenido Complexes: Reactivity of a Linear Iron(I) Silylamide towards Selenium

Main group metal coordination chemistry

Lithium and Dilithium Guanidinates, a Starter Kit for Metal Complexes Containing Various Mono- and Dianionic Ligands

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