Synthesis and characterization of sodium, potassium, zinc and aluminium formamidinate complexes

Salehisaki, Mehdi, Eslami Rad, Nazli E., Junk, Peter, Deacon, Glen B., and Wang, Jun (2021) Synthesis and characterization of sodium, potassium, zinc and aluminium formamidinate complexes. Journal of Coordination Chemistry, 74 (1-3). pp. 102-116.

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The metalation reactions of N,N’-bis-(2,4-dimethylphenyl)formamidine (DMFormH) and N,N’-bis-(phenyl)formamidine (PhFormH) with KN(SiMe3)2 or NaN(SiMe3)2 in toluene/1,2-dimethoxyethane (dme) resulted in the formation of [K(DMForm)(dme)]n (K1), [K2(PhForm)(N(SiMe3)2)]n (K2), [Na(DMForm)(dme)2] (Na1), and [Na(PhForm)(dme)]2 (Na2). Treatment of PhFormH with ZnEt2 or AlMe3 in toluene/tetrahydrofuran (thf) yielded [Zn4(PhForm)6O]·2.5thf (Zn1) and [Al(PhForm)3] (Al1), respectively. The potassium-formamidinate compounds (K1 and K2) are polymeric. K1 has six-coordinate potassium with additional C…K interactions. Reducing the steric effect of the formamidinate changes the formamidinate bonding mode. Thus, for potassium complexes, it led to both inter- and intra-molecular η6-arene-K binding in K2. With the sodium complexes, the structure changed from a six-coordinate monomer in [Na(DMForm)(dme)2] to a five-coordinate dimer in [Na(PhForm)(dme)]2 in which there is a μ 2-1κ(N,N’): 2κ (N) formamidinate binding mode. Zn1 has a pseudo-cubane oxide centered cage like structure, whereas Al1 is monomeric with six-coordinate aluminium and chelating formamidinate ligands.

Item ID: 69907
Item Type: Article (Research - C1)
ISSN: 1029-0389
Keywords: Formamidinates, main group chemistry, s-Block complexes, X-ray structures
Copyright Information: © 2021 Informa UK Limited, trading as Taylor & Francis Group
Date Deposited: 10 Nov 2021 03:51
FoR Codes: 34 CHEMICAL SCIENCES > 3402 Inorganic chemistry > 340205 Main group metal chemistry @ 100%
SEO Codes: 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences @ 100%
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