Self-assembly of a 1D helical manganese coordination polymer and a tetranuclear lanthanum complex with 1,10-phenanthroline and 3,5-dinitrosalicylato dianion

[Mn(phen){3,5-(NO2)2sal2−}]n is a one-dimensional helical structure with Mn atoms in five coordination environment. La2(phen)3{3,5-(NO2)2sal2−}2(NO3)(OH) is a tetranuclear lanthanum complex.