Palladium(II) and platinum(II) complexes of bis(4-methoxyphenyltelluro) methane. Crystal structure of [{meso-(4-MeOC(6)H(4)Te)(2)CH2}(Ph(2)PCH(2)CH(2)PPh(2))Pd(II)](ClO4)(2)center dot 4H(2)O and [meso-(4-MeOC(6)H(4)Te)(2)CH2]Pd(II)Cl-2

Palladium(II) and platinum(II) complexes of the chelating ditelluroether ligand, (MeOC(6)H(4)Te)(2)CH2, have been prepared and characterised by IR, UV-Vis and multinuclear (H-1, Te-125{H-1}, Pt-195{H-1}) NMR spectroscopy and chemical analysis. [{Meso-(4-MeOC(6)H(4)Te)(2)CH2} (Ph(2)PCH(2)CH(2)PPh(2))Pd(II)](ClO4)(2) . 4H(2)O, which crystallizes in the monoclinic system, space group P2(1)/n (No. 14), has the cell parameters a=19.624(7), b=12.324(8), c=21.497(5) Angstrom, beta=92.27(2)degrees, V=5194(3) Angstrom(3), Z=4, R=0.0746, R(w)=0.0692 and [meso-(4-MeOC(6)H(4)Te)(2)CH2]Pd(II)Cl-2, which also crystallizes in the monoclinic system, space group P2(1)/n (No. 14), has the cell parameters a=7.90(2), b=20.36(5), c=11.44(2) Angstrom, beta=100.8(2)degrees, V=1806(6) Angstrom(3), Z=4, R=0.0621, R(w)=0.0650. The immediate environment about tellurium in both compounds is that of the meso invertomer and these are the first reported structures where the chelating ditelluroether has a one-carbon backbone. Only one diastereoisomer was observed in the NMR spectrum of [{meso-(4-MeOC(6)H(4)Te)(2)CH2}(Ph(2)PCH(2)CH(2)PPh(2))Pd(II)](ClO4)(2).