Abstract
The reaction of FeCl 2(HDPhF) 2 (HDPhF = N, N′-diphenylformamidine) with methyllithium in Et 2O followed by extraction into solvent mixtures containing THF, toluene and hexanes produces crystals of Fe 2(μ-DPhF) 4 ( I). This dinuclear compound contains four formamidinato bridges but in an arrangement that is highly distorted compared to the known paddle-wheel structures of M 2(amidinato) 4 molecules. A similar reaction using FeCl 2(HDPhBz) 2 (HDPhBz = N, N′-diphenylbenzamidine) also gives a distorted molecule Fe 2( μ-DPhBz) 2( η 2-DPhBz) 2·2THF ( II), in which two amidine groups form bridges between the metal centers while the other two groups chelate to an iron atom each. The FeFe distances are 2.462(2) and 3.124(1) Å, respectively. Both compounds I and II have been structurally characterized by X-ray crystallography. At −60°C, crystal data for I are: monoclinic, space group I2/a, a = 18.001(6), b = 10.019(1), c = 25.422(9) A ̊ , β = 105.28(1)°, Z = 4 . For II: triclinic, space group P 1 ̄ , a = 10.7874(6), b = 13.1756(7), c = 13.4552(8) A ̊ , α = 99.89(1), β = 109.405(3), γ = 100.210(7)°, Z = 1 .
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.