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Crystal Structure, Spectroscopy and Thermal Study of Manganese (II) Complex with Sarcosine

Rzączyńska Z., Mrozek R., Sikorska-Iwan M.

Polish Journal of Chemistry

2002

Vol. 76 / nr 1

29-35

A polymeric manganese(II) complex of sarcosine [Mn(sar)2(H2O)2]Cl2 (where sar = sarcosine) has been prepared and characterized by elemental, spectroscopic, thermal, magnetic and X-ray investigations. X-ray crystallographic study shows that the octahedral- coordinated manganese(II) ion is situated in the crystallographic center of symmetry and is bound to four carboxylate oxygen atoms of different sarcosine molecules and two water molecules. Two non-coordinated chloride ions are located between the chains. IR spectra of the free ligand and the complex have been discussed. This complex is stable up to 378 K, later loosing water and transforming into oxides. The gas-phase products of decomposition have been analyzed by FTIR spectra.

Properties and Crystal Structure of catena-Poly[praseodymium(III)-hexaaqua-L-threonineK3O,O'O'']trichloride and catena-Poly(pentaaqua-L-threonine-K3O,O',O'') Europium(III) and Ytterbium(III) trichlorides

Rzączyńska Z., Mrozek R., Sikorska-Iwan M., Żak Z., Głowiak T.

Polish Journal of Chemistry

1999

Vol. 73, nr 8

1259-1272

New complexes of L-threonine and lanthanides(III) of the formulae: [Pr(L-thr)(H2O)6]Cl3 and {Ln(L-thr)(H2O)5]Cl3, where Ln is Eu(III) and Yb(III), where obtained. They were characterized by elemental, thermal and spectroscopic analyses, as well as the crystal structures were determined by X-ray diffraction method. The compounds are stable up to about 363 K but further further heating leads to decomposition to oxychlorides and next to oxides.