Synthesis Characterization And Reactivity Of Titanocene Cyclic Organohydroborates Synthesis Spectroscopic Studies And Structures Of Lanthanide Ii Cobalt Carbonyl Complexes

Synthesis, Characterization, and Reactivity of Titanocene Cyclic Organohydroborates ; Synthesis, Spectroscopic Studies, and Structures of Lanthanide(II)-cobalt Carbonyl Complexes

Abstract: PART I: Low valent, paramagnetic titanocene (Ti(III)) cyclic organohydroborates were synthesized, and their chemistry was explored. This family of complexes possess electron deficient Ti-H-B bridges that are reactive towards Lewis acids and bases. Bridging hydride ion is abstracted by the Lewis acidic reagent B(C6F5)3. Depending on the coordinating ability of the solvent, one of two distinct products is formed: one from the noncoordinating solvent toluene and another from the coordinating solvents Et2O and THF. A new chlorine-bridged titanocene cation was also produced. Part II: Novel lanthanide(II)-cobalt carbonyl complexes were prepared and structurally characterized (IR and 59Co NMR spectroscopies, single-crystal X-ray diffraction, laser desorption/ionization mass spectrometry). Transmetalation in strong (Pyr) or moderately strong (THF, DME) coordinating solvents affords discrete ion pairs. A new Co4(CO)112− anion, undiscovered until now, results from oxidation/condensation of Co(CO)4−. Two isomers of this ion (pseudo-C 3v and C 2v symmetries) were observed. moderately strong (THF, DME) coordinating solvents affords discrete ion pairs Ln(L)x Co(CO)42. The Co4(CO)112− anion, undiscovered until now, results from oxidation/condensation of Co(CO)4−. Two isomers (pseudo-C 3v and C 2v symmetries) were observed.

Dissertation Abstracts International

Minority & Women Doctoral Directory