A short, unsupported CuI...CuI interaction, 2.65 A, in a dinuclear guanidine chloride complex.
Chiarella, Gina M; Melgarejo, Doris Y; Rozanski, Alex; Hempte, Pierre; Perez, Lisa M; Reber, Christian; Fackler, Jr, John P; Chemical communications (Cambridge, England) 46 (2009) 136–138; doi:10.1039/b918912b

data_7105133
_publ_section_title
;
 A short, unsupported CuI...CuI interaction, 2.65 A, in a dinuclear
 guanidine chloride complex.
;
_journal_issue                   1
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              136
_journal_page_last               138
_journal_paper_doi               10.1039/b918912b
_journal_volume                  46
_journal_year                    2009
_chemical_formula_moiety         'C14 H26 Cl2 Cu2 N6'
_chemical_formula_sum            'C14 H26 Cl2 Cu2 N6'
_chemical_formula_weight         476.39
_chemical_name_common
;bis(1,3,4,6,7,8-hexahydropyrimido(1,2-a)pyrimidine)dichloro-
di-copper(i)
;
_chemical_name_systematic
bis(1,3,4,6,7,8-hexahydropyrimido[1,2-a]pyrimidine)dichloro-di-copper(I)
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 109.497(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.994(7)
_cell_length_b                   7.167(3)
_cell_length_c                   17.257(7)
_cell_measurement_reflns_used    4523
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      27.49
_cell_measurement_theta_min      2.5
_cell_volume                     1864.7(14)
_computing_cell_refinement       'APEX-II(BRUKER-NONIUS, 2008)'
_computing_data_collection       'APEX-II (BRUKER-NONIUS, 2008)'
_computing_data_reduction        'APEX-II (BRUKER-NONIUS, 2008'
_computing_molecular_graphics    'X-SEED (Barbour, 2001)'
_computing_publication_material  'SHELXTL (Bruker 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'APEX II'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1200
_diffrn_reflns_av_sigmaI/netI    0.0732
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            6509
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.50
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.577
_exptl_absorpt_correction_T_max  0.8263
_exptl_absorpt_correction_T_min  0.6362
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; (Sheldrick, 2006)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.697
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             976
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.568
_refine_diff_density_min         -0.791
_refine_diff_density_rms         0.104
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     127
_refine_ls_number_reflns         2132
_refine_ls_number_restraints     13
_refine_ls_restrained_S_all      1.218
_refine_ls_R_factor_all          0.0470
_refine_ls_R_factor_gt           0.0412
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0663P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1211
_refine_ls_wR_factor_ref         0.1248
_reflns_number_gt                1805
_reflns_number_total             2132
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b918912b.txt
_cod_data_source_block           al2-15
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7105133