Crystal and molecular structures of the 4-(1H)-pyridone (=L) lanthanide complexes {[GdL(NO3)3(H2O)]·CH3OH}2 and [DyL4(NO3)2](NO3) and of L2HNO3

摘要: The crystal structures of the title compounds have been determined by single diffraction methods. Crystals dysprosium compound are monoclinic, space groupP21/c witha=14.133(4),b=13.438(5),c=14.401 (4)A,β=103.98(2)°,V=2654(1)A3,Z=4,D c =1.82 g cm−3, finalR=0.035. Dy atom is eight-coordinate with a distorted dodecahedral coordination geometry involving two bidentate nitrate groups and four pyridone oxygen atoms. An erbium complex analogous stoichiometry was also prepared but not structurally characterized. Gd groupP21/n, witha=11.226(2),b=9.075(2),c=16.737(3)A,β=93.88(3)°,V=1701(1)A3,Z=2,D =1.91 finalR=0.042. Each bonded to one atom, water molecule three groups. nitrates additionally serves bridge pairs atoms so as form dinuclear in which each nine-coordinate tricapped trigonal prismatic geometry. L2HNO3 groupI2/a witha=12.479(4),b=6.535(2),c=14.297(6)A,β=96.07(3)°,V=1159(1)A3,Z=4,D =1.45 finalR=0.057. pyridones linked very short (2.44 A) symmetrical O⋯H⋯O hydrogen bonds. pair further via ion means N-H⋯O(nitrate)⋯H-N bonds, an extended chevron-like pyridone-pyridone-nitrate-pyridone-pyridone array. Adjacent chains weak C-H⋯O(NO3) interactions.