
%0 Journal Article
%A Yang, Yang-Yi 
%A Ng, Seik Weng 
%A Chen, Xiao-Ming 
%T Synthesis and Crystal Structures of Three Carboxylate- Bridged Tetranuclear Copper(<emph type="6">II</emph>)&#8211;Lanthanide(<emph type="6">III</emph>) Complexes of Ph<emph tye="8">3</emph>P<emph type="7">+</emph>CH<emph tye="8">2</emph>CH<emph tye="8">2</emph>CO<emph tye="8">2</emph><emph type="7">&#8722;</emph>
%J Australian Journal of Chemistry
%D 1999/12/03
%V 52
%N 10
%P 983-988
%K 
%R https://doi.org/10.1071/CH99074
%U https://www.publish.csiro.au/paper/CH99074 
%X Three tetranuclear copper(II)&#8211;lanthanide(III) complexes of triphenylphosphoniopropionate (Ph3P+CH2CH2CO2&#8722;,tppp), namely &#91;Cu2Ln2(tppp)8(H2O)8&#93;(ClO4)10&#183;2H 2 O &#91;Ln = EuIII, NdIII or CeIII&#93;, were synthesized and characterized by crystallography. The EuIII complex crystallizes in the triclinic space group P1 &#8211; with a 16.249(7), b 17.185(11), c 17.807(11) &#197;, &#945; 69.750(10), &#946; 89.230(10), &#947; 84.070(10)&#x02DA;, V 4639(5) &#197;3, Z 1. In the crystal structures, four tppp ligands bridge a pair of CuII and tetraaquo-EuIII atoms (Cu&#183;&#183;&#183;Eu 3.527(2) &#197;) through their &#181;2-carboxylato ends to form a dinuclear subunit; two of these subunits are additionally linked by one of the CuII -bonded carboxylato oxygen ends, across a centre of inversion, to furnish a dimeric tetranuclear &#91;Cu(tppp)4 Eu(H2O)4&#93;2 species (Cu&#183;&#183;&#183;Cu 3.323(2) &#197;). This CuII -bonded oxygen atom occupies the apical site of the square-pyramidal coordination environment of the CuII atom. The EuIII atom is eight-coordinated in a square-antiprismatic geometry. The NdIII and CeIII complexes are isomorphous to the EuIII complex, and only minor differences in bond lengths and bond angles involving the metal atoms are noted. 
