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Thermodynamic properties of spin crossover 3d-metal coordination compounds

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Abstract

Thermodynamic studies are necessary to understand the mechanism of such an interesting phenomenon as spin crossover in complex compounds. A number of reviews have already covered spin crossover in mononuclear complexes, so the suggested review considers in more detail the problems of obtaining thermodynamic data for polynuclear complex compounds of iron (II) with 4-substituted 1,2,4-triazole derivatives. The composition of trinuclear and polynuclear complexes of iron (II) with 1,2,4-triazoles was studied in terms of its effect on C p(T) dependence; magnetochemical and thermodynamic data are also confronted with each other.

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Abbreviations

acpa:

Hacpa = N-(1-acetil-isopropylidene) (2-pyridylmethyl) amine

bpy:

2,2′-Bipyridine

bpym:

2,2′-Bipyrimidine

bt:

2,2′-Bi-2-thiazoline

btr:

4,4′-bis(1,2,4-triazole)

bts:

2,2′-Bi(5-methyl thiazoline)

depe:

1,2-Bis(diethylphosphino)ethane

3EtO-salenAPA:

3EtO-salenAPA is the Schiff base condensed from 1 mol of 3-ethoxysalicylaldehyde with 1 mol of N-aminopropylaziridine

Htrz:

1,2,4-Triazole

NH2trz:

4-Amino-1,2,4-triazole

phen:

1,10-Phenanthroline

phy:

1,10-Phenanthroline-2-carbaldehyde phenylhydrazone

2-pic:

2-Aminomethylpyridine or 2-picolylamine

prtrz:

4-Propyl-1,2,4-triazole

py:

Pyridine

pytrz:

4-(pyridyl-2)-1,2,4-triazole

Clthsa :

Chlorinated thiosemicarbazone salicylaldehyde of iron(III)

AVC:

Adiabatic vacuum calorimeter

DSC:

Differential scanning calorimeter

SCO:

Spin crossover

HS:

High-spin state

LS:

Low-spin state

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  1. Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, Akad. Lavrentiev Ave 3, Novosibirsk, Russia, 630090

    G. A. Berezovskii & L. G. Lavrenova

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  1. G. A. Berezovskii
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  2. L. G. Lavrenova
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Correspondence to G. A. Berezovskii.

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Berezovskii, G.A., Lavrenova, L.G. Thermodynamic properties of spin crossover 3d-metal coordination compounds. J Therm Anal Calorim 103, 1063–1072 (2011). https://doi.org/10.1007/s10973-010-1043-y

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