Xiu-Lan Xin

Crystal structure of a new polymorph of bis[μ-1,3-bis(diphenylphosphino)propane-κ2P:P′-disilver(I)] bis(tetrafluoroborate), [Ag(dppp)]2(BF4)2, C54H52Ag2B2F8P4

Abstract C54H52Ag2B2F8P4, triclinic, P1̄ a = 11.4869(4) Å, b = 12.9118(5) Å, c = 19.6858(6) Å, α = 100.8240(10)°, β = 102.185(2)°, γ = 110.470(3)°, V = 2562.31(15) Å3, Z = 2, Rgt(F) = 0.0263, wRref(F2) = 0.0666, T = 293(2) K.

CCDC 1571773: Experimental Crystal Structure Determination

Related Article: Yu Wang, Xiao-Nan Kuang, Yang-Zhe Cui, Xiu-Lan Xin, Hong-Liang Han, Min Liu, Yu-Ping Yang, Qiong-Hua Jin|2018|Polyhedron|155|135|doi:10.1016/j.poly.2018.08.035

CCDC 1571768: Experimental Crystal Structure Determination

Related Article: Yu Wang, Xiao-Nan Kuang, Yang-Zhe Cui, Xiu-Lan Xin, Hong-Liang Han, Min Liu, Yu-Ping Yang, Qiong-Hua Jin|2018|Polyhedron|155|135|doi:10.1016/j.poly.2018.08.035

Lanthanide contraction and chelating effect on a new family of lanthanide complexes with tetrakis(O-isopropyl)methyle-nediphosphonate: synthesis, structures and terahertz time-domain spectroscopy

Sixteen lanthanide–diphosphate complexes [LnL2(H2O)4Cl]Cl2 (Ln = La3+ for 1, Ln = Ce3+ for 2), [LnL2(H2O)4]Cl3·6H2O (Ln = Nd3+ for 3, Ln = Sm3+ for 4, Ln = Eu3+ for 5, Ln = Gd3+ for 6, Ln = Tb3+ for 7, Ln = Dy3+ for 8, Ln = Er3+ for 9), {[LaL2(H2O)4Cl]Cl2}2 (10), [PrL2(OH)2(H2O)Cl] [PrL2(H2O)4Cl]Cl2 (11), [LaL2(H2O)5Cl]Cl2·2H2O (12), [YbL2(H2O)3Cl]Cl2·H2O (13), [NdL2(H2O)3Cl]Cl2·3H2O (14), [HoL2(H2O)Cl2]Cl·H2O (15), [Sc2L2(H2O)4(OH)2]Cl4·4H2O·2CH3OH (16) (L = tetrakis(O-isopropyl)methylenediphosphonate) have been synthesized by the reaction of lanthanide chlorides and L ligand in the solvent of acetonitrile (with ethanol or DMF) at room temperature. The title complexes were characterized by IR, elemental analysis, single-crystal X-ray diffraction analysis, thermal analysis, 1HNMR and 31PNMR spectroscopy. Complexes 1–15 are mononuclear complexes and complex 16 is a binuclear cluster complex. Complex 12 is the intermediate of complex 1. Complexes 11–13 display a one-dimensional chain formed by hydrogen bonds and the structures of complexes 14, 16 can be simplified as two-dimensional mesh 63 topology formed by hydrogen bonds. In those lanthanide complexes, the lanthanide ion with an atomic number smaller than Pr element tends to form a nine-coordinated structure and that with the atomic number larger than Pr element tends to form an eight or lower number-coordinated structure. Pr element has two kinds of coordination situations, with coordination numbers of nine or eight. The terahertz (THz) time-domain spectra of these complexes were also studied.