Spectroscopic and differential scanning calorimetric studies of the phase transitions in oxanorbornane
Article Abstract:
Oxanorbornane, C6H10O, 7-oxabicyclo(2.2.1)heptane, is like other molecules that are similar to bicycloheptanes in that it has order-disorder transitions in the solid state. Use of differential scanning calorimetry has shown that five phases may occur with hysteresis in transition temperature ranges. From the vibrational spectra and factor group analysis of the vibrational splittings it can be seen that the ordered phase has crystal structure with D-sub-2d symmetry. Molecular motion activation energies were derived from proton spin-lattice relaxation time measurements.
Publication Name: Canadian Journal of Chemistry
Subject: Chemistry
ISSN: 0008-4042
Year: 1998
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A simple method for the generation of negative pressure in liquids
Article Abstract:
A simple method for generation of negative pressure in liquids has been developed. It is based on the pressure difference across a curved liquid-vapor surface. Minisci in pores with very small radii may induce large negative tensions or pressures in the liquid phase. Magnitude of the tension can be controlled easily through the pressure of the external vapor phase. Reducing pore size would in principle lead to maximum possible tensions predicted by the theory of homogeneous nucleation and by spinodal decomposition.
Publication Name: Canadian Journal of Chemistry
Subject: Chemistry
ISSN: 0008-4042
Year: 1998
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Pressure-tuning infrared and Raman spectroscopic study of (2,2'-bypyridine)tetracarbonylchromium(0)
Article Abstract:
Pressure-tuning infrared and Raman spectroscopic study has been made of (2,2'-bipyridine)tetracarbonylchromium(0). The carbonyl moieties are pressure-dependent. The dependence indicates that the bipyridyl ligand can accommodate a significant part of the molecular compressibility at higher pressures. Pressure-tuning spectroscopy study can be very helpful in finding structural features of complex organic and organometallic species.
Publication Name: Canadian Journal of Chemistry
Subject: Chemistry
ISSN: 0008-4042
Year: 1998
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