Vibrational spectra of carboxylato complexes—IV. Mixed-metal and mixed-valence oxo-trinuclear complexes

Investigation of amino acid containing [FeFe] hydrogenase models concerning pendant base effects

“…We suggest that the l 3 -oxygen atom comes from atmospheric molecular oxygen, which is in agreement with results found by Zacchini and co-workers for the compound 6 (DMF)(THF) 2 [37]. In contrast to the literature reports the iron(III) or iron(II) starting species was a low valence iron species (Fe I Fe I or all-Fe 0 ) [38,39].…”

Single-walled carbon nanotube growth using [Fe3(µ3-O)(µ-O2CR)6(L)3]n+complexes as catalyst precursors

“…Fe 3 O(O 2 CCH 3 ) 6 (H 2 O) 3 was prepared according to a previously reported method. 16 Methoxyacetic acid (Aldrich), acetic acid (Fisher), sodium bicarbonate (Fisher), 200 proof EtOH (Pharmco), and FeCl 3 •6H 2 O (Alfa Aesar) were ACS reagent grade or better and used as received. Spin-on-glass was purchased from Honeywell and used as received.…”

Aminopyridine complexes of Cr(III) basic carboxylates as potential polymer precursors: Synthesis, characterization, and crystal structure of [Cr3O(propionate)6(X-aminopyridine)3]+ (X = 3 or 4)

“…For a series of basic trinuclear Cr(III) acetate and formate complexes and their deuterio analogs, Cannon and co-workers [47,48] have convincingly assigned the IR spectra and identified the vibrational modes of the central Cr 3 O modes. Assuming D 3h symmetry for the trinuclear core of the symmetric complexes, the planar Cr 3 O unit should have four fundamental vibrational modes.…”