The Infrared Spectra of Rare Earth Metal Chloride Complexes of 2,2'-Bipyridyl and 1,10-Phenanthroline from 650 to 70 Cm^-11

Abstract

The infrared spectra of rare earth metal chloride complexes of 2,2'-bipyridyl and 1,lO-phenanthroline are reported from 650 to 70 cm-'. The position of the V M -N vibration is observed to vary with the properties of the metal and ligand.From the infrared spectra in this region, frequency assignments are suggested for the Y M -N vibrations.A number of 2-carbamoyldimedone and N-phenyl-2-carbamoyldimedone complexes of the first transition metal series have been synthesized. The metal-ligand coordination has been investigated by spectral, magnetic, and proton and electron resonance measurements. The results indicate that the oxygen rather than the nitrogen of the carbamoyl group is coordinated to the metal ion. These findings are compared with the coordinate bonding reported for acetoacetamide and salicylamide complexes. Evidence of intermolecular bonding is presented, and a molecular structure is proposed.

Coordination complexes of gallium(in) and indium(III) halides. III. Complexes of gallium(III) halides with 2,2′-bipyridyl

“…The medium intensity band at 620 cm-I moves 15-25 cm-I to higher frequency on complexing and the 403 cm-I band is resolved into two or three components in the complexes. Similar changes have been noted previously (5,18,19). A strong band at 560 cm-' with shoulders at 540 and 546 cm-I is presumably v4(t1,) of PF,-in [GaX,(bipy),]-PF, and v4(t2) of BF,-in [GaCl,(bipy),]BF, is at 541 cm-I.…”

Synthesis and Characterization of Diiron(III)-Substituted Silicotungstate, [γ(1,2)-SiW10{Fe(OH2)}2O38]6-

“…30 (2) It has also been reported that water molecules bound to Fe give broad bands (ν 1/2 ) ca. 430 cm -1 ) around 3400 cm -1 , 31 and that bridging OH groups between metal ions of Fe, Cu, and Co give broad bands from 3300 to 3600 cm -1 , [32][33][34] as observed for TBA-I.…”

Polyamine substitution reactions of tris(2-aminoethyl)aminecopper(II)

“…In reactions 1 and 2 only the first four terms of eq 5 contribute to the rate expression while in reaction 3 all five terms contribute to the expression. The second (&LCuTr) and third (&HLCuTr) terms in eq 6 can alternatively be expressed as the mono-and diprotonated ligand attack on Cu (OH) tren since the regres- (11) Stability constants for the different complexes at 25°and 0.1 M ionic strength: CuTr, log K -18.8; CuT, log K = 20.1; CuTe, log K = 22.9; CuD, log K = 15.8; CuD2, log K = 5.22; Cu(OH)Tr, log Ki = 4.65. See L. G. Sillén and A. E. Martell, Ckem.…”