The Structure of Dichlorobis(l-proline)zinc(II)

Abstract

The title complex was prepared at pH 4.0. The crystal and molecular structures have been determined by X-ray diffraction. The crystals of ZnCl2(C5H9NO2)2, F.W.=366.55, were orthorhombic: space group P212121, a=13.527(3), b=16.263(3), c=6.598(1) Å, U=1451.4(5) Å3, Z=4, Dm=1.67 g cm−3, Dx=1.68 g cm−3, and μ(Mo Kα)=21.2 cm−1. The zinc atom is coordinated in a tetrahedral geometry to two chlorine atoms and the two carboxyl oxygen atoms of two l-proline ligands. Each l-proline is coordinated as a monodentate ligand.

Growth and characterization of dichlorobis l-proline Zn(II): A semiorganic nonlinear optical single crystal

“…And also some L-proline-based materials have been reported recently [15,16]. The title complex was prepared in water and the crystal structure was first reported by Yukawa et al [9], and the results were consistent with the analysis of the present work. In the present investigation we report on the synthesis and growth of DBLPZ from a mixed solvent of water and methanol and its characterization.…”

“…Amino acids have two or more types of coordination atoms and can act as various bridging ligands [7][8][9][10]. Taking advantage of the properties of the amino acid ligands, an amino acid complex was used as a ligand in order to synthesize a new heteronuclear complex.…”

Synthesis, crystal growth and characterizations of bis (l-proline) cadmium iodide: a new semi-organic nonlinear optical material

“…The molecular geometry is similar to that observed in related amino acid containing compounds [19,[25][26][27].…”

Compounds of Amino Acids and Neutral Salts

“…The structure of this unit is not unique. On the contrary, it was found in many amino acid salts, such as the respective DL-alanine salt (Subha Nandhini et al 2002a) and dichloro-bis(glycine)-zinc dihydrate (Fleck et al 2008a), both L-and DL-proline zinc chloride (Yukawa et al 1985;Lutz and Bakker 2003), and the respective betaine and sarcosine salts (Chen and Mak 1991c;Subha Nandhini et al 2001b).…”

“…These phases both comprise the same unit that is found for the salts of glycine, DL-alanine, and DL-valine, i.e., a tetrahedron with two chloride anions and two monodentate amino acid zwitterions. The L-proline salt was first characterized by Yukawa et al (1985), later refined by Hoffmuller et al (1999); Anandha Babu and Ramasamy (2008) published optical and dielectric data on this species.…”