Absence of common intermediates in the induced reactions of cobalt(III) complexes. Mercury(2+) and nitrosyl-induced aquation and base hydrolysis of [Co(Me(tren))(NH3)X]3+/2+ species: crystal and strain-energy-minimized structures of the s and p isomers of the [Co(Me(tren))(NH3)Cl]2+ ion

The Interaction between Amminehalocobalt(III) Cations and Polythionate Anions: Hydrogen-Bonding Patterns and S–S Bond Cleavage Reactions

“…[3] Compound 3 also is interesting when viewed against the fact that the S 3 O 6 2Ϫ ion underwent a structures have not been reported in the CSD [7] except for a few compounds with an N-methylated tren ligand. [8] Also it is noted that Asakura et al reported a chiral autocatalysis reaction leading to the preparation of an optically pure form of the cation of 3 as a bromide salt without water molecules of crystallization. [9] …”

Synthesis and Structure of the Methylated Tren Derivative N,N,N-Tris(2-aminoethyl)-N-methylammonium Chloride Trihydrochloride

“…† (1) R 1 = R 2 = R 3 = R 4 = R 5 = R 6 = H (2) R 1 = CH 3 , R 2 = R 3 = R 4 = R 5 = R 6 = H (3) R 1 = R 3 = R 5 = CH 3 , R 2 = R 4 = R 6 = H (4) R 1 = R 2 = R 3 = R 4 = R 5 = R 6 = CH 3 N H 3 N N H 3 NH 3 CH 3 Cl 4 (5) hydrochloric acid (Scheme 1). The product was purified using cation-exchange chromatography (HCl eluent) and was isolated as the trihydrochloride salt following crystallization from H 2 O/EtOH.…”

“…[15] Experimental Synthesis of N,N,N-Tris(2-Aminoethyl)-N-methylammonium Chloride . 3HCl (5) A mixture of tris(2-phthalimidoethyl)amine [16] (10.0 g, 18.6 mmol) and dimethyl sulfate (8.8 mL, 93 mmol) in dry DMF (100 mL) was heated at 70°C for 12 h with stirring in a 250 mL round-bottomed flask equipped with a drying tube. After cooling to room temperature, the solution was poured into diethyl ether (750 mL) to give a brown oil.…”

“…[4] Attempts to alter the donor properties of the tren ligand have also resulted in the syntheses of simple alkylated tren derivatives such as monomethyltren (2), [5] trimethyltren (3) [6] and hexamethyltren (4), [7] and of these, the last in particular shows substantially modified coordination behaviour when compared with the parent tren ligand. ‡ While the syntheses of the aforementioned tren species involve derivatization at the terminal nitrogen atoms, there are to date no reports of the effect of specific modification of the tertiary nitrogen of tren on its coordination ability.…”

Outer sphere complexes as intermediates in coordination chemistry

“…Buckingham et el. [79], quoting the work of Reenstra and Jencks [4] on cobalamin exchange, consider the latter type of mechanism in a study of several Co(III) substitution reactions.…”