Vapor pressure of tetrakis(1,1,1-trifluro-5,6-dimethylheptanedionato) zirconium(IV) and dichlorobis( 5-cyclopentadienyl)zirconium(IV) by TG-based transpiration technique
Jeevan, T. S. A., Mathews, T.[Tom], Raghunathan, V. S., Nagaraja, K. S.
Zr(tfpm)4 (tfpm = 1,1,1-trifluro-5,6-dimethylheptanedionate) (1), was prepared and characterized by FTIR, FABMS (Mol.Wt. = 869) and TG.DTA analyses. The TG.DTA curve exhibited a single step volatilization commencing from its melting point of 121 .C and volatilizes with a nil residue at 210 .C; ZrCp2Cl2 (2) melts at 241 .C and it completely volatile at 310 .C leaving nil residue. The equilibrium vapor pressure of (1) and (2) over the range of 121.4.152 .C and 135.4.176 .C were determined to be log(pe/mPa) = 12 }1.3700 }260/T (.C) and log(pe/mPa) = 13.1 }0.1.4533 }40/T (.C), respectively by employing a TG-based transpiration technique. The enthalpies of vaporization ( H.vap) for (1) and (2) as calculated from the slope of the curve were found to be 71 }5 and 87 }1kJmol.1, respectively. The entropies of vaporization ( S.vap) for (1) and (2) as calculated by using Trouton fs rule were found to be 180.2 }13 and 169.3 }0.2 J mol.1 K.1, respectively.
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.