133256-59-4Relevant academic research and scientific papers
Chloro(N,N′,N″-trimethyl-1,5,9-triazacyclododecane-κ 3N)zinc(II) hexafluorophosphate
Alcock, Nathaniel W.,Clase, Howard J.,Siltchenko, Svetlana,Rybak-Akimova, Elena,Busch, Daryle H.
, p. 338 - 340 (1998)
The preparation and crystal structure of [ZnCl(C12H27-N3)]PF6 are described. The Zn atom has a tetrahedral environment, coordinated to three N atoms of the triaza macrocyclic ligand and to one Cl- ion. The Zn - N distances are in the range 2.037 (1)-2.048 (1) A, with Zn - Cl 2.2010 (4) A.
Method for preparing alkoxyamines from nitroxides
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, (2008/06/13)
The invention relates to a process for preparing alkoxyamines. This process consists in mixing, in an organic solvent, a metal salt, a ligand for the metal, a halocarbon compound ZX and a nitroxide, in keeping the reaction medium stirring at a temperature of between 20° C. and 90° C. until the nitroxide has disappeared, in recovering the organic phase, in washing it with water and then in isolating the alkoxyamine by evaporating the organic solvent under reduced pressure.
Coordination to RMg+ and RZn+ cations
Tang, Hui
, p. 4810 - 4819 (2008/10/08)
Addition of a second coordinating agent (coord*) to a solution of RM(coord)+A- (R = ethyl or neopentyl, M = Zn or Mg, A- = 1,2,3,4-tetraphenylcyclopentadienyl) can provide equilibrium mixtures of these compounds, coord, and RM(coord*)+A-. This exchange with RMg(coord)+ requires the addition of a small amount of R2Mg, but added R2Zn is not necessary for exchanges with RZn(coord)+. The equilibrium constants provide information about the relative abilities of different coordinating agents to coordinate to RM+ and reveal significant differences between coordination to RMg+ and RZn+. Reactions of RM(coord)+ with R′2M (R = ethyl or neopentyl for RMg(coord)+ and ethyl, isopropyl, tert-butyl, neopentyl, or p-methylphenyl for RZn(coord)+) provide equilibrium mixtures of these components, R′M(coord)+, and R2M. The equilibrium constants provide information about the effect of R on stability. An X-ray structure of p-methylphenylzinc(2,5,8,11-tetramethyl-2,5,8,11-tetraazadodecane)+ shows that just three of the N atoms are coordinated to Zn. The effects of coord, R, and metal on RM(coord)+ stability are discussed, and the abilities of coordinating agents to coordinate to RM+, to slow allylic isomerization of (CH2 double bond CMeCH2)2Zn, and to convert R2Zn to RZn(coord)+ are compared.
New Synthetic Routes to Macrocyclic Triamines
Alder, Roger W.,Mowlam, Rodney W.,Vachon, David J.,Weisman, Gary R.
, p. 507 - 508 (2007/10/02)
1,5,9-Triazacyclododecane and related macrocyclic triamines can be conveniently constructed around a single carbon atom as a template; this route permits the preparation of selectively alkylated derivatives.
Fragmentation During the Formic Acid/Formaldehyde (Eschweiler-Clarke) Methylation of Polyamines
Alder, Roger W.,Colclough, David,Mowlam, Rodney W.
, p. 7755 - 7758 (2007/10/02)
Eschweiler-Clarke methylations of both acyclic and cyclic polyamines can lead to methylation products of fragments of the original polyamine; thus 1,5,9,13-tetra-azatridecane yields 1,1,3,3-tetramethylpropanediamine exclusively and 1,5,9-triazacyclododecane gives 45 percent 1,5,9-trimethyl-1,5,9-triazacyclododecane and 45 percent 2,6,10-trimethyl-2,6,10-triazaundecane.
