ABSTRACT

A new Mn (III) Schiff-base coordination compound, [Mn(L)(NCS)]2 (H2L = N,N0-bis(5-chlorosalicylidene)- 1,2-diaminoethane), has been synthesized and characterized structurally and magnetically. The target compound is a phenoxo-bridged dimeric compound with the isothiocyanate coordinating in a usual bent mode. A magnetic susceptibility study reveals that the target compound exhibits antiferromagnetic intra-dimer coupling between Mn (III) ions. The low temperature heat capacity of the compound over the temperature range (2 to 300) K has been measured using the heat capacity option of a Quantum Design Physical Property Measurement System (PPMS). The thermodynamic functions in the experimental temperature range have been determined by curve fitting. The standard entropy and enthalpy of the as-prepared compound at T = 298.15 K have been calculated to be (924.52 +- 10.17) J K 1 mol 1 and (133.47 +- 1.47) kJ mol 1, respectively.

Compounds

#	Formula	Name
1	C34H24Cl4Mn2N6O4S2	bis(.mu.-(4-chloro-2-(((2-(((5-chloro-2-(hydroxy-.kappa.O)phenyl)methylene)amino-.kappa.N)ethyl)imino-.kappa.N)methyl)phenolato(2-)-.kappa.O:.kappa.O))bis(thiocyanato-.kappa.N)dimanganese

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	1	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	X-ray diffraction	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Relaxation Calorimetry - Quantum Design PPMS	144
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Relaxation Calorimetry - Quantum Design PPMS	59
POMD	1	Molar entropy, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Relaxation Calorimetry - Quantum Design PPMS	59
POMD	1	Molar enthalpy, kJ/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Relaxation Calorimetry - Quantum Design PPMS	59

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Magneto-structural correlation and low temperature heat capacity of a Mn (III) quadridentate Schiff-base coordination compound

Chen, S.[Sanping], Shi, Q.[Quan], Xia, Z.[Zhengqiang], Yue, K.[Kefen], Gao, S.[Shengli], Woodfield, B. F.[Brian F.]

ABSTRACT