Synthesis, crystal structure, and vibrational spectrum of lithium N-(4′-benzo-15-crown-5)-5-bromo-2-hydroxyphenylaldiminatozinc perchlorate dihydrate

The synthesis, the IR absorption spectrum, and X-ray diffraction analysis of the complex [ZnLi(L-1)(2)(H2O)](ClO4) center dot H2O (I) (HL1 = N-(4'-benzo-15-crown-5)-5-bromo-2-hydroxyphenylaldimine) are described. The crystals of I are monoclinic, a = 19.840(4) angstrom, b = 13.947(3) angstrom, c = 19.956(4) angstrom, beta = 117.06(3)angstrom, V = 4917.4(17) angstrom(3), Z = 4, space group P2(1)/n, R = 0.0609 for 1409 reflections with I > 2 sigma(I). In the complex cation [ZnLi(L-1)(2)(H2O)](+), the Zn atom is bound to a distorted tetrahedral array of two N atoms (av. Zn-N, 2.027(10) angstrom) and two O atoms (av. Zn-O, 1.8968(8) angstrom) of two deprotonated L1 ligands. The Li atom linked to the five ether oxygen atoms (av. Li-O-ether, 2.254(3) angstrom) sits atop the benzo-15-crown-5 (B15C5) macrocyclic plane of one coordinated L-1 ligand. The Li coordination is completed by water oxygen (Li-O(w1), 1.83(5) angstrom). The B15C5 cavity of the second coordinated ligand L1 is vacant.