Gd(1)-O(12) 2.373(2) Gd(2)-O(5) 2.372(2) Gd(1)-O(2) 2.407(2) Gd(2)-O(9) 2.385(3) Gd(1)-O(16) i 2.411(2) Gd(2)-O(18) 2.416(2) Gd(1)-O(15) i 2.435(2) Gd(2)-O(14) 2.440(2) Gd(1)-O(7) ii 2.482(2) Gd(2)-O(13) 2.442(3) Gd(1)-O(17) 2.489(2) Gd(2)-O(3) iii 2.454(3) Gd(1)-O(8) 2.562(3) Gd(2)-O(4) 2.540(3) Gd(1)-O(7) 2.568(2) Gd(2)-O(3) 2.744(3) Gd(2)-O(10) 2.364(2) i x-1,y,z ii -x+1,-y+1,-z+1 iii -x+2,-y+2,-z

No abstract

The asymmetric unit of the title compound, [Zn(C12H11N2O4)2(H2O)4]·4H2O, contains one-half of the complex mol­ecule and two uncoordin­ated water mol­ecules. The four water O atoms in the equatorial plane around the ZnII centre ( symmetry) form a distorted square-planar arrangement, while the distorted octa­hedral coordination geometry is completed by the O atoms of the zwitterionic 2-methyl­benzimidazolium-1,3-diacetate ligands in the axial positions. The benzimidazole ring system is planar, with a maximum deviation of 0.041 (3) Å. Intra­molecular O—H⋯O hydrogen bonding results in the formation of a non-planar six-membered ring. In the crystal structure, strong intra- and inter­molecular O—H⋯O hydrogen bonds link the mol­ecules into a three-dimensional network. π–π contacts between benzimidazole rings [centroid–centroid distance = 3.899 (1) Å] may further stabilize the structure.

The asymmetric unit of the title complex, [Pd2(NO3)4(C58H52N2P4)], contains one half-mol­ecule, in which the central benzene ring is located on a crystallographic centre of inversion. The Pd atom has a distorted square-planar coordination consisting of two P and two O atoms. In the crystal structure, inter­molecular C—H⋯O inter­actions link the mol­ecules into chains, and π–π contacts between the phenyl rings [centroid–centroid distance = 3.928 (3) Å] may further stabilize the structure.

In the title mononuclear complex, [Ag(C18H18N2P)(NO3)2], the metal centre is coordinated in a slightly distorted trigonal–planar geometry by the P atom of the phosphine ligand and the O atoms of the two monodentate nitrate anions. In the crystal structure, complex mol­ecules are connected by inter­molecular N—H⋯O hydrogen bonds, forming chains running parallel to the b axis.