Poly[di(μ2-2-hydroxypropanoato)cadmium

Ao-Wei Chen,Bi-Bo Shi,Zheng Yin,Rong Shi,Ce Wang

doi:10.1107/s2414314619012550

Abstract

The asymmetric unit of the title inorganic–organic salt, poly[di(μ 2 -2-hydroxypropanoato)cadmium], [Cd(C3H5O3)2] n or [Cd(Hlac)2] n (H2lac = 2-hydroxypropanoic acid), comprises of a cadmium cation and two 2-hydroxypropanoate anions. The cadmium cation exhibits a distorted pentagonal–bipyramidal coordination environment defined by the hydroxy and carbonyl O atoms of the 2-hydroxypropanoate anions. The coordination mode leads to the formation of layers extending parallel to (010). O—H...O hydrogen bonding between the hydroxy and carbonyl groups stabilizes the structure packing.

Highlights

The asymmetric unit of the title inorganic–organic salt, poly[di(2-2-hydroxypropanoato)cadmium], [Cd(C3H5O3)2]n or [Cd(Hlac)2]n (H2lac = 2-hydroxypropanoic acid), comprises of a cadmium cation and two 2-hydroxypropanoate anions
The coordination mode leads to the formation of layers extending parallel to (010)
Compounds with metal–organic framework (MOF) structures with accessible open space have rapidly grown into a major area of chemical research because of their structural diversity and wide applications (Furukawa et al, 2013)

Summary

Structure description

Compounds with metal–organic framework (MOF) structures with accessible open space have rapidly grown into a major area of chemical research because of their structural diversity and wide applications (Furukawa et al, 2013). Crystal engineering of MOFs has been dominated by single organic units like polycarboxylates, polypyridines, azolate or their derivatives. Mixed-ligand MOFs (Yin et al, 2015), were found to be successful in the rational construction of materials with targeted functionalities. One of the interesting candidates for the construction of mixed-ligand MOFs is 2-hydroxypropanoic acid (H2lac). Working with the corresponding anion has several advantages: (i) multiple coordination modes by using the hydroxyl and carboxyl groups are possible; (ii) the anion is flexible and a chelating ligand, and can facilitate the formation of key building units such as chains or layers; (iii) the terminal methyl group can be replaced by –H, –C2H5, –Ph and other groups for structural regulation and expansion.

DÁ Á ÁA

Synthesis and crystallization

Absolute structure parameter

Data collection

Special details