76282-33-2Relevant academic research and scientific papers
C-H activation by a diselenido dinickel(II) complex
Wallick, Jessica,Riordan, Charles G.,Yap, Glenn P. A.
, p. 14972 - 14974 (2013)
Addition of selenium to the nickel(I) complex, [Ni(Me4[12] aneN4)(CO)]PF6, effects a redox reaction leading to the diselenido dinickel(II) complex, {[(Ni(Me4[12]aneN4)] 2(Se2)}(PF6)2, in 70% crystalline yield. The product's structure features a μ-η2: η2-Se2 ligand with Se-Se bond length of 2.379(13) A?. Upon mild heating, {[(Ni(Me4[12]aneN4)] 2(μ-η2:η2-Se2)}(PF 6)2 oxidizes 9,10-dihydroanthracene or 1,4-cyclohexadiene forming the terminal hydroselenide, [Ni(Me4[12]aneN 4)(SeH)]PF6, and anthracene or benzene, respectively. [Ni(Me4[12]aneN4)(SeH)]PF6 cleanly converts back to the diselenido dinickel(II) adduct upon addition of a phenoxy radical.
A method for preparing nitrogen heterocyclic
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, (2017/02/24)
The invention discloses a preparation method of azacyclo. The preparation method comprises the following steps of: (1) reacting diethylenetriamine or triethylene tetramine with methylsulfonyl chloride to generate methanesulfonamide; (2) during two-phase reaction, cyclizing compound catalytic cyclization on methanesulfonamide and a compound having the structure shown in a chemical formula (a) under the composite catalysis of benzyl triethylanmine compound and 15-crown-5 at 90 DEG C under a backflow condition; and (3) removing methylsulfonyl from methanesulfonamide azacyclo and performing methylation treatment, wherein X represents bromine, iodine or sulphonate. The preparation method has the advantages that raw materials are low in cost, atom economy is high, and operation is easy and safe. The preparation method is suitable for industrial production.
The Preparation, Characterization and Solution Chemistry of Some Nickel(II) and Copper(II) Complexes of 1,4,7,10-Tetramethyl-1,4,7,10-tetraazacyclododecane
Coates, John H.,Hadi, Dewan A.,Lincoln, Stephen F.
, p. 903 - 909 (2007/10/02)
The preparation of the new ligand 1,4,7,10-tetramethyl-1,4,7,10-tetraazacyclododecane, (-N(Me)(CH2)2-)4 (= L), and the complexes (ClO4)2, (ClO4)2, ClO4, (ClO4)2, and (ClO4)2, where Y = (-N(Me)(CH2)2N(Me)(CH2)3-)2, 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane, are described.The magnetic moments of the nickel(II) species are reported, and the labile low-spin/high-spin equilibria characterizing the 2+ and 2+ systems over a range of temperatures and ionic strengths in aqueous solution are discussed.The spectrophotometric titration of the aqua ligands in 2+, 2+, and 2+ against sodium hydroxide yields pKa values of 10.2+/-0.2, 12.0+/-0.3 and 10.7+/-0.2, respectively, and a study, using Job's method of continuous variations, of the formation of azide species shows + and + to be formed predominantly in aqueous solution.
