Search: onr:"swepub:oai:research.chalmers.se:27e2b1f1-0a3d-4e2e-ba00-a14d0ed635bc" >
An investigation of...
An investigation of Cu(II) and Ni(II)-catalysed hydrolysis of (di)imines
-
- Czaun, Miklos (author)
- Lund University,Lunds universitet,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
-
- Nelana, S. M. (author)
- Vaal University of Technology,University of Johannesburg
-
- Guzei, I. A. (author)
- University of Wisconsin Madison
-
show more...
-
- Hasselgren, Catrin, 1970 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Hakansson, M. (author)
- Göteborgs universitet,University of Gothenburg
-
- Jagner, Susan Elisabeth, 1940 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Lisensky, G. (author)
- Beloit College
-
- Darkwa, J. (author)
- University of Johannesburg
-
- Nordlander, Ebbe (author)
- Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
-
show less...
-
(creator_code:org_t)
- Elsevier BV, 2010
- 2010
- English.
-
In: Inorganica Chimica Acta. - : Elsevier BV. - 0020-1693. ; 363:12, s. 3102-3112
- Related links:
-
http://dx.doi.org/10...
-
show more...
-
https://doi.org/10.1...
-
https://research.cha...
-
https://lup.lub.lu.s...
-
show less...
Abstract
Subject headings
Close
- The reactions of six diimine ligands with Cu(II) and Ni(II) halide salts have been investigated. The diimine ligands were Ph2C=N(CH2)(n)NC=Ph-2 (n = 2 (Bz(2)en, 1a), 3 (Bz(2)pn, 1b), 4 (Bz2bn, 1c)), N, N'-bis-(2-tert-butylthio- 1-ylmethylenebenzene)-2,2'diamino-biphenyl (2), N,N'-bis-(2-chloro-1-ylmethylenebenzene)-1,3diaminobenzene (3) and N,N'-bis-(2-chloro-1-ylmethylenebenzene)-1,2-ethanediamine (4). Reactions of 1a-c, 2-4 with CuCl2 center dot 2H(2)O in dry ethanol at ambient temperature led to complete or partial hydrolysis of the diimine ligands to ultimately form copper diamine complexes. The non-hydrolyzed complexes of 1b and 1c, [Cu(L)Cl-2] (L = 1b, 1c), could be isolated when the reactions were carried out at low temperatures, and the half-hydrolyzed complex [Cu(Bzpn)Cl-2] could also be identified via X-ray crystallography. Similarly, reactions of 1a or 1b with NiCl2 center dot 6H(2)O or [NiBr2(dme)] led to rapid hydrolysis of the imines and Ni complexes containing half-hydrolyzed 1a (Bzen; [trans-[Ni(Bzen)(2)Br-2]) and 1b (Bzpn; [Ni(Bzpn) Br-2] could be isolated and identified via single crystal X-ray analysis. Kinetic studies were made of the hydrolyses of 1a, 1b in THF and 2 in acetone, in the presence of Cu(II), and of 1a in acetonitrile, in the presence of Ni(II). Activation parameters were determined for the latter reaction and for the copper-catalyzed hydrolysis of 2; the relatively large negative activation entropies clearly indicate rate-determining steps of an associative nature.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Hydrolysis
- Catalysis
- molecular-structure
- copper(ii) complexes
- Copper
- Nickel
- ligands
- chromophores
- Diimine
- crystal
- Nickel
- Copper
- Catalysis
- Diimine
- Hydrolysis
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database