Pandurangan, K.; Gildea, B.; Murray, C.; Harding, C. J.; Müller-Bunz, H. and Morgan, G. G.
(2012).
Lattice effects on the spin-crossover profile of a mononuclear manganese(III) cation.
Chemistry - A European Journal, 18(7)
pp. 2021–2029.
(
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Abstract
Six solvated salts of a mononuclear manganese(III) complex with a chelating hexadentate Schiff base ligand are reported. One member of the series, [MnL]PF6.0.5 CH3OH (1), shows a rare low-spin (LS) electronic configuration between 10–300 K. The remaining five salts, [MnL]NO3⋅ C2H5OH (2), [MnL]BF4⋅C2H5OH (3), [MnL]CF3SO3⋅C2H5OH (4), [MnL]ClO4⋅C2H5OH (5) and [MnL]ClO4⋅0.5 CH3CN (6), all show gradual incomplete spin-crossover (SCO) behaviour. The structures of all were determined at 100 K, and also at 293 K in the case of 3–6. The LS salt [MnL]PF6.0.5 CH3OH is the only member of the series that does not exhibit strong hydrogen bonding. At 100 K two of the four SCO complexes (2 and 4) assemble into 1D hydrogen-bonded chains, which weaken or rupture on warming. The remaining SCO complexes 3, 5 and 6 do not form 1D hydrogen-bonded chains, but instead exhibit discrete hydrogen bonding between cation/counterion, cation/solvent or counterion/solvent and show no significant change on warming.
| Item Type: |
Journal Article
|
| Copyright Holders: |
2012 Wiley-VCH |
| ISSN: |
1521-3765 |
| Keywords: |
crystal engineering; hydrogen bonding; manganese; spin crossover; temperature modulation |
| Academic Unit/Department: |
Science > Life, Health and Chemical Sciences |
| Related URLs: |
|
| Item ID: |
34408 |
| Depositing User: |
Charlie Harding
|
| Date Deposited: |
25 Oct 2012 08:02 |
| Last Modified: |
14 Nov 2012 12:25 |
| URI: |
http://oro.open.ac.uk/id/eprint/34408 |
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