Temperature dependent studies on structural and electronic effects in single crystals
Abstract
The first system is the octahedral complex tris(4-((6-methyl-2-pyridyl)-3-aza-3-butenyl)-amino iron hexafluorophosphate, which exhibits a sharp change in magnetic moment from high-spin to low-spin near 215 K in the solid state. The second system is the one-dimensional semi-conductor tetrathiofulvalinium bis-cis-(1, 2-perfluoromethylethylene-1, 2-dithiolato) copper, which exhibits a small, but sharp break in the magnetic susceptibility near 250 K due to a first order phase transition, and undergoes a spin-Peierls transition to a singlet ground state at 12.4 K. The third molecule is the first stable silacyclopropane compound, dimethyldispiro (bicycle (4.1.0)-heptane-7,2'-silacyclo-propane-3'7-bicyclo(4.1.0)heptane). The molecular structure was determined using single crystal X-ray diffraction, and is compared with that reported for other three-membered ring compounds. The final molecule is 9,9-dipyrazolyl-9-borabicyclo-(3,3,1)-nonane dicarbonyl trihaptoallyl molybdenum. This complex has a proton which has a chemical shift of 15 tau which is greater than previously observed for a nonbonded metal-hydrogen interaction.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- July 1976
- Bibcode:
- 1976PhDT........35D
- Keywords:
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- Molecular Electronics;
- Single Crystals;
- Structural Stability;
- Temperature Effects;
- Crystal Structure;
- Magnetic Properties;
- Solid State Physics;
- X Ray Spectroscopy;
- Solid-State Physics