Synthesis, structure, and properties of a binuclear Fe(III) complex with N-(1-propanol)-N,N-bis(3-tert-butyl-5-methyl-2-hydroxybenxyl)amine

Abstract

Mannich reaction of 2-Amino propanol, 2-tertbutyl-4-methylphenol, and formaldehyde in the ratio of 1:2:2 provides a new compound, N-(1-propanol)-N,N-bis-((3-tert-butyl-5-methyl-2-hydroxybenxyl)amine (H 3 L), which has been characterized by X-ray crystallography and elemental analysis. In the presence of Et 3 N, the reaction of H 3 L and FeCl 3 Á6H 2 O gives a dinuclear Fe(III) complex [Fe 2 L 2 ] 1, which has been characterized by X-ray crystallography, magnetic measurement, and cyclic voltammetry. The value of l eff at room temperature (5.97 l B ) is much less than the expected spin-only value (8.37 l B ) of two high spin (hs) Fe 3? (S = 5/2) ions [l = g[ P ZS(S ? 1)] 1/2 ], indicating there are strong coupling interactions between Fe 3? ions. The magnetic behavior of 1 denotes the occurrence of intramolecular antiferromagnetic interactions (J = -13.35 cm -1 ). CV of 1 reveals two reversible waves at 0.433 and 1.227 V versus AgCl/Ag, which can be ascribed to the successive redox

Mononuclear Pseudostannatranes Possessing Unsymmetrical [4.4.3.01,5]Tridecane Cage: Experimental and Theoretical Aspects of Reverse Kocheshkov Reaction in Phenyl Pseudostannatrane

“…Herein, we utilized a heteropolydentate ligand N­(CH 2 CH 2 OH)­{CH 2 (2- t -Bu-4-Me-C 6 H 2 OH)} 2 (H 3 L) with a bulky substituent in the phenolic ring to obtain pseudostannatranes. The H 3 L is previously reported to obtain dinuclear complexes of iron and vanadium, Fe 2 L 2 and V 2 O 2 L 2 , respectively (where L is deprotonated ligand). − Although the structure of its analog, i.e., N­(CH 2 CH 2 OMe)­{CH 2 (2- t -Bu-4-Me-C 6 H 2 OH)} 2 (having variation at the alcoholic arm), has been investigated, structural aspects of the H 3 L, however, were not elucidated in detail. In the present work, the H 3 L has been isolated in crystalline form, and its structure is confirmed by spectroscopic studies and single-crystal X-ray crystallography.…”