稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2004年
5期
721-724
,共4页
肖洪平%胡茂林%时茜%李新华
肖洪平%鬍茂林%時茜%李新華
초홍평%호무림%시천%리신화
inorganic chemistry%crystal structure%hydrothermal synthesis%lanthanum(Ⅲ)%mixed ligands%rare earths
A new dimeric lanthanum(Ⅲ) complex [La2(phen)2(C7H3N2O6)6](phen=1,10-phenanthroline) was synthesized by the hydrothermal method and determined by single crystal X-ray diffraction analysis. The La(Ⅲ) ion is coordinated to seven oxygen atoms from five carboxylate groups and two nitrogen atoms from a phen ligand,forming a monocapped square antiprismatic geometry. Six carboxylate groups coordinate to two La(Ⅲ) ions in three modes which are chelating bidentate,bridging bidentate and bridging tridentate. The crystal is triclinic with space group P-1,a=1.2030(4) nm,b=1.2962(5) nm,c=1.3330(5) nm,α=104.410(5)°,β=114.048(4)°,γ＝100.054(4)°,V=1.7467(10) nm3,Mr=952.46,Z=2,Dc=1.811 g·cm-3,F(000)=944,S=1.017,μ=1.320 mm-1,with R1=0.0298 and wR2=0.0625.
