1,5-Bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide methanol 0.47-solvate

Abstract

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.008 Å; disorder in main residue; R factor = 0.044; wR factor = 0.111; data-to-parameter ratio = 5.9.

A Dy2 single-molecule magnet with benzoate anions and phenol-O− bridging groups

“…Furthermore, two pivalate ligands hold the two centrosymmetrically related Dy III together with μ 2 :η 1 ,η 2 mode. In our work, the multisite coordinating ligand, H 4 L, was synthesized by adapting a previous procedure reported by Gaye et al, 48 resulting from the reaction of o-vanillin and carbohydrazide. The ligand has the potential stability to provide N,O-based multi-chelating sites (Scheme S1 †) to form a coordinate pocket (Scheme S1 †).…”

“…The ligand, 5-bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide (H 4 L), was prepared by a previously reported procedure. 48 The FT-IR spectra were recorded in the range of 400-4000 cm −1 using KBr pellets on an EQUINOX55 FT/IR spectrophotometer. Elemental analysis (C, H, N) was performed on a Perkin-Elmer 2400 CHN elemental analyzer.…”

“…It is necessary to prepare complexes with similar structures [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] to further discuss the structureproperty relationships in depth. 24,47 Selection of an organic ligand, 1,5-bis(2-hydroxy-3-methoxybenzylidene)carbonohydrazide (H 4 L), 48 formed by the reaction between o-vanillin and carbohydrazide is a good choice to construct such a cluster because the ligand provides N,O-based multichelating sites to form a coordinate pocket (Scheme S1 †), which is especially favorable for accommodating lanthanide ions. 27,49 Additionally, lanthanide carboxylates, such as Dy(PhCOO) 3 21 and Dy(OAc) 3 , 27,35 were introduced into the systems with the view of enriching the coordination modes by utilizing multidentate acetate groups.…”