Dissertation Information for David W. BlakesleyNAME:
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SCHOOL: ADVISORS: COMMITTEE MEMBERS: MPACT Status: Fully Complete Title: Physical and chemical investigations of iron complexes with 1,4,7-trimethyl-1,4,7-triazacyclononane and [2.2.2.2.3]adamanzane Abstract: "The spin-transition character of several iron(II) complexes is studied in both the solid state and in solution. Iron(II) complexes with 1,4,7-trimethyl-1,4,7-triazacyclononane, Me 3 tacn, and 1,4,7-tribenzyl-1,4,7-triazacyclononane were synthesized. The variable temperature X-ray cystallographic data of [Fe(Me 3 tacn)(MeCN) 3 ](BPh 4 ) 2 and [Fe(Bn 3 tacn)(MeCN) 3 ](B 12 H 12 ) are presented as a way of measuring the high-spin/low-spin character of the complexes in the solid state. Magnetic susceptibility of [Fe(Me 3 tacn)(MeCN) 3 ](BPh 4 ) 2 was measured on a SQUID spectrometer. The spin equilibrium and the ligand exchange equilibria of [Fe(Me 3 tacn)(MeCN) 3 ](CF 3 SO 3 ) 2 in solution was studied using variable temperature paramagnetic 1 H and 19 F NMR techniques. [Fe((CD 3 ) 3 tacn)(MeCN) 3 ](CF 3 SO 3 ) 2 was synthesized and variable temperature 2 H NMR was performed on this compound in acetonitrile to further investigate the electron spin and chemical equilibria in solution. These experiments indicated that the triflate salt of the iron (II) me 3 tacn complex in solution is involved not only in a spin equilibrium, but is also involved in ligand exchange between the triflate counterion and coordinated acetonitriles. The 19F NMR experiments showed the presence of triflate bridged iron dimers and terminally bound triflates, as well as uncoordinated triflate. |
MPACT Scores for David W. BlakesleyA = 0 Advisors and Advisees Graph |