213130-55-3Relevant academic research and scientific papers
Monoanionic triketiminate ligands: Peculiarity of coordination mode to lithium and rare earth ions
Cherkasov, Anton V.,Fukin, Georgy K.,Kovylina, Tatyana A.,Skvortsov, Grigorii G.,Trifonov, Alexander A.
, (2020)
Deprotonation of β-triketimines (2,6-Me2C6H3N = CMe)3CH (1), (2,6-Me2C6H3N = CMe)2CH(2-MeOC6H4N = CtBu) (2), (2,6-Me2C6H3N = CMe)2CH(2,6-Me2C6H3N = CtBu) (3) by equimolar amount of n-BuLi afforded lithium triketiminate complexes [(2,6-Me2C6H3N = CMe)3C]Li(THF) (4), [(2,6-Me2C6H3N = CMe)2C(2-MeOC6H4N = CtBu)]Li(THF)2 (5), [(2,6-Me2C6H3N = CMe)2C(2,6-Me2C6H3N = CtBu)]Li(THF)2 (6) in 70–80% yields. The salt metathesis reactions of LnCl3 (Ln = Y, Nd) with 6 lead to the formation of neutral triketiminate dichloro complexes [(2,6-Me2C6H3N = CMe)2C(2,6-Me2C6H3N = CtBu)]LnCl2(THF)2 (Ln = Y (7), Nd (8)) in 78 and 70% yields, while the analogous reaction of YCl3 with 5 resulted in triketiminate yttrium chloro ate complex [(2,6-Me2C6H3N = CMe)2C(2-MeOC6H4N = CtBu)]Y(THF)Cl(μ2-Cl)2Li(THF)2 (9). The reactions of the potassium derivatives of the related triketimines 2, 3 with YbI2(THF)2 resulted in the formation of mononuclear triketiminate iodo Yb(II) complexes [(2,6-Me2C6H3N = CMe)2C(2-MeOC6H4N = CtBu)]YbI(THF)2 (10) and [(2,6-Me2C6H3N = CMe)2C(2,6-Me2C6H3N = CtBu)]YbI(TMEDA) (11). X-ray analysis revealed that in 4 and rare-earth metals complexes 7–11 the monoanionic β-triketiminate ligands [(2,6-Me2C6H3N = CMe)3C]?, [(2,6-Me2C6H3N = CMe)2C(2-MeOC6H4N = CtBu)]?, [(2,6-Me2C6H3N = CMe)2C(2,6-Me2C6H3N = CtBu)]? feature bidentate coordination mode and are coordinated to a metal center only through two nitrogen atoms. The ternary systems 7–9/AliBu3/[CPh3][B(C6F5)4] exhibit catalytic activity in isoprene polymerization, allowing to carry out polymerization of 1000 equivalents in 2 h with 91–100% conversion. The obtained polyisoprenes feature high molecular weights (Mn = 12.8 × 104–20.2 × 104) and moderate polydispersities (Mw/Mn = 2.7–3.6), however excellent control of regio- and stereoselectivities (up to 9.9% cis-1,4 units) was observed.
C-Nitrosation of a β-diketiminate ligand in copper(ii) complex
Kalita, Aswini,Kumar, Vikash,Mondal, Biplab
, p. 643 - 649 (2015)
A copper(ii) complex, 1 of a β-diketiminate ligand {L = (4-(2,6-dimethylphenylimino)pentane-2ylidene)-2,6-dimethylbenzeneamine} has been synthesized and characterized. Single crystal X-ray structure reveals the presence of a mononuclear copper(ii) unit with a distorted square planar geometry. In acetonitrile solution of the complex, the β-diketiminate ligand undergoes oxidative degradation to the corresponding ketone diimine under aerobic condition. Addition of nitric oxide to the acetonitrile solution of complex 1 affords the corresponding oxime diimine ligand. All the modified ligands have been isolated and characterized. This journal is
Triketiminate bis(borohydride) complexes of rare-earth metals [(2,6-Me2C6H3N=CMe)2C(2,6-Me2C6H3N=CBut)]Ln(BH4)2(THF)2 (Ln = Y, Nd): sy
Skvortsov,Cherkasov,Trifonov
, p. 1665 - 1674 (2018/01/01)
A new triketimine (2,6-Me2C6H3N=CMe)2CH(2,6-Me2C6H3N=CBut) (1) was synthesized by the reaction of imidoyl chloride 2,6-Me2C6H3N=CClBu
Ethylene oligomerization using nickel-β-diimine hybrid xerogels produced by the sol-gel process
Rossetto, Enéderson,Caovilla, Marcela,Thiele, Daniel,De Souza, Roberto F.,Bernardo-Gusm?o, Katia
, p. 152 - 159 (2013/08/25)
Nickel-β-diimine complexes have been used as homogeneous- and heterogeneous-phase oligomerization catalysts. The following complexes have also been heterogenized on silica using the sol-gel method: 1,5-bis(phenyl)- pentanediimine-dibromonickel(II) (A), 1,
Synthesis, characterization, and reactivity of the first osmium β-diketiminato complexes and application in catalysis
Schreiber, Dominique F.,O'Connor, Crystal,Grave, Christian,Mueller-Bunz, Helge,Scopelliti, Rosario,Dyson, Paul J.,Phillips, Andrew D.
, p. 7345 - 7356 (2014/04/03)
The strongly chelating anionic β-diketiminate ligand has been employed to formulate complexes involving almost every metal of the periodic table; however, the heavier metals of the d block remain relatively unexplored. This paper describes the synthesis a
A three-coordinate copper(II) amide from reductive cleavage of a nitrosamine
Melzer, Marie M.,Mossin, Susanne,Dai, Xuliang,Bartell, Ashley M.,Kapoor, Pooja,Meyer, Karsten,Warren, Timothy H.
supporting information; experimental part, p. 904 - 907 (2010/06/11)
A NO-velty: A copper(1) β-diketiminate activates the nitrosamine Ph2NNO to give a rare, three-coordinate copper(II) amide, [(Me 2NN)Cu-NPh2]. Reaction of this amide with NOgas returns Ph2NNO as well as a mixed-valence species with NOfunctionalized β-diketiminate ligands (see scheme; Cu light blue, N dark blue, O red). Thus, both the cleavage and formation of R2N-NO bonds may take place at a common copper center. (Figure Presented)
