Please use this identifier to cite or link to this item:
Title: Synthesis, characterization, and single-molecule metamagnetism of new Co(ii) polynuclear complexes of pyridine-2-ylmethanol
Authors: Pattacini, R.
Teo, P.
Zhang, J. 
Lan, Y.
Powell, A.K.
Nehrkorn, J.
Waldmann, O.
Hor, T.S.A. 
Braunstein, P.
Issue Date: 28-Oct-2011
Citation: Pattacini, R., Teo, P., Zhang, J., Lan, Y., Powell, A.K., Nehrkorn, J., Waldmann, O., Hor, T.S.A., Braunstein, P. (2011-10-28). Synthesis, characterization, and single-molecule metamagnetism of new Co(ii) polynuclear complexes of pyridine-2-ylmethanol. Dalton Transactions 40 (40) : 10526-10534. ScholarBank@NUS Repository.
Abstract: The reaction between pyridine-2-ylmethanol (HL), anhydrous CoCl2 and NaH afforded polynuclear Co(ii) complexes [Co7(L) 12]Cl2 (1), [Co6Na(L)12]Cl (2) and [Co4Cl2(L)6] (3), depending on the HL:CoCl 2 ratio set in the reaction. The core structures of the centrosymmetric complexes 1 and 2 are of the M@Co6 type (M = Co or Na, respectively) with a coplanar arrangement of the metals whereas that of centrosymmetric 3 is of an incomplete dicubane type. The experimental conditions allowing interconversions between these polynuclear complexes have been determined, which provides a more rational control of their synthesis. Thus, 1 transforms to 3 when reacted with CoCl2 in a 1:1 ratio, whereas the same reaction performed with a large excess of CoCl2 gave the tetranuclear pseudo-cubane complex [Co4(L)4Cl 2(MeOH)4] upon recrystallization. Conversely, 1 was isolated from the reaction of 3 with HL and NaH. The crystal structure of these compounds is reported, along with the magnetic behaviour of 1 and 3. The analysis of the magnetism using the effective spin-1/2 Hamiltonian approach revealed single-molecule metamagnetic behavior in 3. © 2011 The Royal Society of Chemistry.
Source Title: Dalton Transactions
ISSN: 14779226
DOI: 10.1039/c1dt10631g
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Nov 30, 2022


checked on Nov 30, 2022

Page view(s)

checked on Nov 24, 2022

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.