Complexity of imine and amine Schiff-base tin(ii) complexes: drastic differences of amino and pyridyl side arms

Abstract

A series of imine and amine Schiff-base tin(ii) complexes were synthesized. Complexes having dimethylamino side arm appears to be innocent while those having pyridyl side arm underwent unusual ligand dimerization.

Ring-Opening Co- and Terpolymerization of Epoxides, Cyclic Anhydrides, and l-Lactide Using Constrained Aluminum Inden Complexes

“…Metal complexes play an important role to control catalytic activity and selectivity in the polymerizations . In the past decades, several metal complexes such as zinc, − magnesium, ,,, manganese, − iron, , tin, − chromium, ,,− cobalt, ,− and aluminum ,,,,,− were reported to efficiently catalyze ROCOP of epoxides and cyclic anhydrides. Among the reported catalysts, the salen-based ligand systems were extensively explored due to simple ligand synthesis and diverse electronic and steric modifications of the substituents and diamine backbones. , The salen-based system was demonstrated to have high activities for ROCOP in the presence of nucleophilic cocatalysts such as bis (triphenylphosphine)­iminium chloride (PPNCl), 4-dimethylaminopyridine (DMAP), or tetrabutylammonium bromide (TBAB). ,, In 2015, Coates and colleagues reported the copolymerization of propylene oxide (PO) and terpene-based cyclic anhydrides (TBAs) catalyzed by chromium, cobalt, and aluminum (salph) complexes .…”

DFT stimulation and experimental insights of chiral Cu(ii)–salen scaffold within the pocket of MWW-zeolite and its catalytic study

“…Nonreacted ligands were extracted with acetone, and free Cu(II) ions were eliminated through ion-exchange with 0.1 M NaCl solution. The sample was then thoroughly washed with distilled water, and dried in air oven for 60 min to obtain the chiral Cu(II)-salen complex encapsulated in MWW zeolite [47][48][49][50][51][52] (Scheme 1). FTIR (KBr): 3444, 2940, 2865, 1630, 1501, 1460, 1279, 1236, 1091, 808, 766, 661, 601, 558, 505, and 450 cm À1 ; BET results: 28.52 m 2 g À1 , surface area; 3.4 nm, average pore diameter; 0.16 cm 3 g À1 , pore volume.…”

Covalent Organic Frameworks‐Based Membranes as Promising Modalities from Preparation to Separation Applications: An Overview

“…[63][64][65] Triazoles, amines and imines are the other materials which are strongly basic in nature. [66,67] Thus, purposely introducing such groups to the skeleton will help in designing CO 2 -philic materials.…”

“…It is well established that triazine based materials are strongly basic in nature with their point zero charge above the pH 7 [63–65] . Triazoles, amines and imines are the other materials which are strongly basic in nature [66,67] . Thus, purposely introducing such groups to the skeleton will help in designing CO 2 ‐philic materials.…”