catena-Poly[[triaquacadmium(II)]-μ₂-pyrazine-2,3-dicarboxylato]

Abstract

Key indicatorsSingle-crystal X-ray study T = 293 K Mean (C-C) = 0.009 Å R factor = 0.034 wR factor = 0.090 Data-to-parameter ratio = 10.0For details of how these key indicators were automatically derived from the article, see

Linkage isomerism for 4-methylimidazole and a new coordination mode of pyrazine-2,3-dicarboxylate ligand in {[Cd(pzdc)(4-mim)(5-mim)2]·½H2O}n coordination polymer

“…Also, mixed chelating-bridging modes have also been previously reported [29,35]. For examples; in the [Cd(pzdc)(H 2 O) 3 ] n complex [24], the pzdc ligand acts as a bridge between two Cd(II) atoms as a bis(bidentate) ligand via coordinating through the nitrogen atoms of pyrazine ring and two oxygen atoms of carboxylate groups, in the [Cd(pzdc)(phen)]•H 2 O polynuclear complex [18], the pzdc ligand exhibits the μ 3 coordination mode by means of a bidentate oxygen atom of a carboxyl group, the N atom of pyrazine and as a bis(monodentate) oxygen atom of the neighboring carboxyl group, while in the [Cd 2 (pzdc) 2 (4,4'-bipy)(H 2 O) 2 ] polynuclear complex, the pzdc ligand is coordinated to three Cd(II) ions through two oxygen atoms and one N atom [18]. In the [Cd(pzdc)] n polynuclear complex, the Cd(II) atom is six coordinated by five carboxylate oxygen atoms and one N atom from five different pzdc ligands in a distorted octahedral coordination geometry [36].…”

“…The H 2 pzdc anions (Hpzdc − and pzdc 2− ) behave as versatile ligands and they act as bridging ligands to metals [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. The H 2 pzdc anions coordinate to metal ions via its two carboxyl groups and two nitrogen atoms of the pyrazine ring.…”

“…Various possible coordination modes for the H 2 pzdc anions were illustrated in Scheme 1. [53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69]] H 2 pzdc anions show bidentate [30][31][32][33][34], bis(bidentate) bridge (μ 2 ) [13][14][15][16], tridentate bridge (μ 2 ) [17][18][19][20][21][22], tetradentate bridge μ 2 - [24], μ 3 - [23] and μ 4 - [18] and bis(monodentate) bridge (μ 2 ) [17] coordination types. According to our literature survey, the pzdc ligand is mainly coordinated via the carboxylate oxygen, nitrogen atom and O atom of a neighboring carboxyl group, acting as a tridentate bridge [18][19][20][21][22].…”

“…The keys for the rational design of metal-organic coordination polymers with novel topologies and specific chemical or physical properties are the judicious choice of the metal ion and the main ligands which well known coordination ability, and a careful selection of the terminal ligands [10][11][12]. To synthesis novel MOFs, the pyrazine-2,3-dicarboxylate ligand has been rapidly evolved in recent years [1].Pyrazine-2,3-dicarboxylic acid (H 2 pzdc) and its anions have been composed with metal salts to yield insoluble polynuclear materials [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. The H 2 pzdc anions (Hpzdc − and pzdc 2− ) behave as versatile ligands and they act as bridging ligands to metals [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Syntheses, structural characterization and antimicrobial activities of novel cobalt-pyrazine-2,3-dicarboxylate complexes with N-donor ligands

“…Pyrazine-2,3-dicarboxylic acid (H 2 pzdca, Scheme 1a) is a well-known versatile ligand, which has been extensively used in the design of coordination complexes due to a variety of its bonding abilities. Pzdca ligand coordinate to metal ions by means of its four oxygen atoms of carboxylate groups and two nitrogen atom of pyrazine ring forming monodentate [1], bidentate [2][3][4][5], bis(bidentate) bridge (l 2 ) [6][7][8][9], bis(monodentate) bridge (l 2 ) [10], tridentate bridge (l 2 ) [10][11][12][13][14][15], tetradentate bridge (l 3 ) [15][16][17][18][19][20][21] and mixed chelating-bridging ligand [22].…”