Structure of a lead(II) complex of a new 13-membered macrocycle with two pendant carboxymethyl groups

Abstract

(Aqua)[2,9-dioxo-κ 2 O,O'-1,4,7,10-tetraazaκ 2 N 4 ,N 7 -4,7-cyclotridecanediacetato(2 -)-κ 2 O, O'']-lead(II) dihydrate, [Pb(C 13 H 20 N 4 O 6 )(H 2 O)].2H 2 O, M r =589.56, monoclinic, P2 1 /c, a=8.999;1), b=23.055 (1), c=9.382 (1) A, β=108.58 (1) o , V=1845.I (4) A 3 , Z=4, D x =2.12 g cm -3 , λ(Mo Kα)=0.71073 A, μ=92.6 cm -1 , F(000)=1144, T=294 A, R=0.026 for 2829 independent reflections with I>3σ(I). A Pb II ion is coordinated to six atoms from a macrocyclic ligand and an O atom from water. An additional weak coordination bond with an O atom from an adjacent metal chelate molecule results in a binuclear structure