title: Li+ cation coordination in [Li2(CF3SO3)2(diglyme)] and [Li3(C2F3O2)3(diglyme)].
abstract: The title compounds, poly[[[bis(2-methoxyethyl) ether]lithium(I)]-di-mu(3)-trifluoromethanesulfonato-lithium(I)], [Li(2)(CF(3)SO(3))(2)(C(6)H(14)O(3))](n), and poly[[[bis(2-methoxyethyl) ether]lithium(I)]-di-mu(3)-trifluoroacetato-dilithium(I)-mu(3)-trifluoroacetato], [Li(3)(C(2)F(3)O(2))(3)(C(6)H(14)O(3))](n), consist of one-dimensional polymer chains. Both structures contain five-coordinate Li(+) cations coordinated by a tridentate diglyme [bis(2-methoxyethyl) ether] molecule and two O atoms, each from separate anions. In both structures, the [Li(diglyme)X(2)](-) (X is CF(3)SO(3) or CF(3)CO(2)) fragments are further connected by other Li(+) cations and anions, creating one-dimensional chains. These connecting Li(+) cations are coordinated by four separate anions in both compounds. The CF(3)SO(3)(-) and CF(3)CO(2)(-) anions, however, adopt different forms of cation coordination, resulting in differences in the connectivity of the structures and solvate stoichiometries.