H-bond supported coordination polymers of transition metal sulfites with different dimensionalities

Abstract

Three novel transition metal–sulfite coordination complexes are synthesized using different amines and the role of H-bonding to provide structures with different dimensionalities are discussed.

Organically templated linear metal sulfites

“…We have been trying to prepare framework materials using sulte ion as basic structural units and have discovered interesting frameworks. 48 In continuation to this theme, we have now been able to isolate six 1-D organically templated metal sultes namely [(C 3 H 10 N) 2 ][Zn(SO 3 ) 2 ], 1,…”

2D Layer Structure in Two New Cu(II) Crystals: Structural Evolvement and Properties

“…The void between the neighboring layers is dotted by the guest water molecules. The two hydrogen atoms of H 2 O form a double H-bond (O−H•••O) interaction with the carboxylic groups of neighboring layers with the D-A length of 2.757(2) and 2.880(2) Å [28]. Besides this, π-π stacking interactions with a center-center distance of 3.71 and 4.25 Å [29] are also found between the pyridines of dtp 2− from the neighboring layers (Figure 3).…”

“…The introduction of bdc − into 2 results in a linkage reduction of the asymmetric unit; compared with 1, the asymmetric unit of 2 behaves as a three-connective node to link the neighboring units, further forming a "ladder-shaped" 1D chain extending in the crystal b direction (Figure 4b). The 1D chain was found arrayed in the crystal a direction through the neighboring chain interaction of the H-bond (O−H•••O) and π-π stacking interactions; the former exist between the carboxylic and carboxylate groups with a D-A distance 2.5770( 16) Å [28], while the latter is formed between pyridine rings with a center-center distance of 4.38 Å [29]. The inter-chain interactions afford the orderly array of 1D chains, and further give birth to 2D supermolecular layers with a thickness of ca.…”

The first organically templated open-framework metal-sulfites with layered and three-dimensional diamondoid structures

“…We have been exploring sulfur based anionic complexes, such as sulfide, sulfite, sulfate, and thiosulfate, as secondary building units for generating open-framework materials. 20,35 In an effort to synthesize open-framework metal sulfites, we have been able to synthesize organically templated open-framework metal sulfites with layered structure of the formula (NH 3 CH 2 CH 2 NH 3 )[Zn 3 (SO 3 ) 4 ], 1, § and three-dimensional structures of the formula (CN 3 H 6 ) 2 [Zn(SO 3 ) 2 ], 2, possessing the diamondoid network under hydrothermal conditions for the first time.…”

“…The Zn-O bond lengths are in the ranges of 1.949-2.003 Å and S-O bond lengths are in the ranges of 1.523-1.5363 Å and are comparable to the literature reports. 28,29,35,36 The crystal structure refinement parameters and complete list of bond lengths and angles are given in Tables S1 and S2 (ESI ‡), respectively. The Zn center is tetrahedrally coordinated with four oxygen atoms, of which two form Zn-O-S1 linkages and the remaining two form Zn-O-S2 linkages.…”