The sodium salt of a tris(tridentate anion)gadolinium(III) complex: pentasodium bis[chelidamato(3−)][chelidamato(2−)]gadolinate(III) hexadecahydrate

Abstract

The sodium salt of a tris(tridentate anion)gadolinium(III) complex: pentasodium bis[chelidamato(3À À)]-[chelidamato(2À À)]gadolinate(III) hexadecahydrate

Crystal structure of 4-hydroxypyridinium triaqua-bis(4-hydroxypyridine- 2,6-dicarboxylato)neodymium(III) dihydrate, [C5H6NO][Nd(C7H3NO5)2(H2O)3] · 2H2O

“…The angles of the CAM to the central ion range from 61.72(7)°to 123.62(7)°.T he dihedral angle between the two pyridyl rings attached to the central ion is 60.21°,and the dihedral angle between pyridyl rings attached to the central ion and the pyridyl ring of free 4-Hpy ligand vary from 63.59°to 68.18°.In both CAM ligands the dicarboxylate groups are almost coplanar, and the atoms in the pyridine deviate from the mean plane defined by the pyridine ring by less than 0.100 Å.D eviation from the mean plane defined by the pyridine ring are observed for both of carboxylate groups with values ranging from O4 -0.0641 to O2 +0.0893 Å.This implies that the CAM is afairly rigid ligand and retains its integrity on metal chelation. This coordination mode can also be observed in analogous lanthanide complexes [7,8]. In the IR spectra, the vibrations of n as(CO 2-)a nd nas(CO 2-)a re at 1638.3 cm -1 and 1396.7 cm -1 ,respectively.…”

Crystal structure of poly[(.3-4-(4-oxopyridin-1(4H)-yl)phtalato- κ4O,O':O'':O''')-(μ2-2-carboxy-5-(4-oxopyridin-1(4H)-yl)benzoato- κ3O,O':O'')samarium(III)], C26H15N2O10Sm

“…The design and construction of lanthanide-metal-organic frameworks (Ln-MOFs) based on the judicious selection of ligands and metal ions have become avery attractive field of research in coordination chemistrya nd crystale ngineering [1][2][3]. Nowadays, lanthanide coordination polymers based on polycarboxylic ligands are prevalent because of their high structural stability and various coordination modes [4,5].…”

Crystal structure of ammonium 2-carboxy-5(4-oxopyridine-(4H)-yl)-benzoate monohydrate, C13H14N2O6

“…Judicious selection/design of organic ligands is the key approach for desired structures and functions [3,4]. In the past two decades, many types of polytopic organic ligands with different donor groups, such as carboxylate, pyridyl, amine, benzene, phosphate, etc., have been used in the generation of coordination polymers [5]. Among them, polypyridyls and polycarboxylates have been widely used because they generally have good ligating ability to metal ions and readily adjustable length and geometry [6].…”