Unexpected structural similarity between the chlorocopper(I) unit and the methyllithium and phenyllithium units. First complexes between (-)-sparteine and copper(I) chloride: synthesis and structural characterisation.
A.Johansson; M.Vestergren; M.Hakansson; B.Gustafsson; S.Jagner; New J.Chem.(Nouv.J.Chim.)  (2004) –; doi:

data_7050328
_publ_section_title
;
Unexpected structural similarity between the
chlorocopper(I) unit and the methyllithium and phenyllithium units.
First complexes between (-)-sparteine and copper(I) chloride:
synthesis and structural characterisation.
;
_journal_name_full               'New J.Chem.(Nouv.J.Chim.)'
_journal_year                    2004
_chemical_formula_moiety         'C30 H52 Cl4 Cu4 N4'
_chemical_formula_sum            'C30 H52 Cl4 Cu4 N4'
_chemical_formula_weight         864.72
_chemical_name_common            bis((-)-sparteine)tetrachlorotetracopper(I)
_chemical_name_systematic        bis((-)-sparteine)tetrachlorotetracopper(I)
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 100.390(8)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.3278(18)
_cell_length_b                   16.118(3)
_cell_length_c                   12.848(3)
_cell_measurement_temperature    293(2)
_cell_volume                     1696.3(6)
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.04
_diffrn_reflns_av_unetI/netI     0.0497
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            10605
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         25
_diffrn_reflns_theta_min         1.61
_exptl_absorpt_coefficient_mu    2.817
_exptl_absorpt_correction_type   'empirical REQAB CrystalClear'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.693
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             888
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         1.133
_refine_diff_density_min         -1.069
_refine_diff_density_rms         0.089
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.019(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     379
_refine_ls_number_reflns         5899
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0592
_refine_ls_R_factor_gt           0.0527
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0976P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.142
_refine_ls_wR_factor_ref         0.1457
_reflns_number_gt                5220
_reflns_number_total             5899
_reflns_threshold_expression     >2sigma(I)
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7050328