data_1100291 _chemical_formula_sum 'C18 H42 Cl2 Mg2 N4' _symmetry_cell_setting monoclinic _symmetry_space_group_name_H-M 'P 21/n' _symmetry_Int_Tables_number 14 _cell_length_a 8.445(1) _cell_length_b 11.020(1) _cell_length_c 13.504(1) _cell_angle_alpha 90 _cell_angle_beta 92.58(1) _cell_angle_gamma 90 _cell_formula_units_Z 2