Flexibility of cubane-like Cu4I4 framework: temperature dependence of molecular structure and luminescence thermochromism of [Cu4I4(PPh3)4] in two polymorphic crystalline states.
Kitagawa, Hakuba; Ozawa, Yoshiki; Toriumi, Koshiro; Chemical communications (Cambridge, England) 46 (2010) 6302–6304; doi:10.1039/c0cc01434f

data_7112996
_publ_section_title
;
 Flexibility of cubane-like Cu4I4 framework: temperature dependence of
 molecular structure and luminescence thermochromism of [Cu4I4(PPh3)4] in
 two polymorphic crystalline states.
;
_journal_issue                   34
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              6302
_journal_page_last               6304
_journal_paper_doi               10.1039/c0cc01434f
_journal_volume                  46
_journal_year                    2010
_chemical_absolute_configuration ad
_chemical_formula_moiety         '((C6 H5)3 P) Cu I)4'
_chemical_formula_sum            'C72 H60 Cu4 I4 P4'
_chemical_formula_weight         1810.84
_chemical_name_systematic
tetrakis(triphenylphosphane-\m~3~-iodo-copper(I))
_space_group_IT_number           220
_symmetry_cell_setting           cubic
_symmetry_Int_Tables_number      220
_symmetry_space_group_name_Hall  'I -4bd 2c 3'
_symmetry_space_group_name_H-M   'I -4 3 d'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   30.1826(5)
_cell_length_b                   30.1826(5)
_cell_length_c                   30.1826(5)
_cell_measurement_temperature    300(1)
_cell_volume                     27496.0(8)
_computing_cell_refinement       'Rapid-Auto (Rigaku Co. Ltd., 2006)'
_computing_data_collection       'Rapid-Auto (Rigaku Co. Ltd., 2006)'
_computing_data_reduction
'RAPID-AUTO (Rigaku Co. Ltd., 2006), SORTAV (Blessing, 1995)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      300(1)
_diffrn_detector_area_resol_mean 10
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID-F'
_diffrn_measurement_method       '\w axis oscillation'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0699
_diffrn_reflns_av_sigmaI/netI    0.0352
_diffrn_reflns_limit_h_max       42
_diffrn_reflns_limit_h_min       -42
_diffrn_reflns_limit_k_max       42
_diffrn_reflns_limit_k_min       -37
_diffrn_reflns_limit_l_max       42
_diffrn_reflns_limit_l_min       -42
_diffrn_reflns_number            112088
_diffrn_reflns_theta_full        29.97
_diffrn_reflns_theta_max         29.97
_diffrn_reflns_theta_min         3.02
_diffrn_source                   'normal-focus sealed tube'
_diffrn_source_type              'Rigaku R-AXIS'
_exptl_absorpt_coefficient_mu    3.151
_exptl_absorpt_correction_T_max  0.7649
_exptl_absorpt_correction_T_min  0.6761
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'ABSCOR (Higashi, Rigaku Co.Ltd., 1995)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.750
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             14080
_exptl_crystal_recrystallization_method toluene/ether
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.758
_refine_diff_density_min         -1.227
_refine_diff_density_rms         0.128
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         6669
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0985
_refine_ls_R_factor_gt           0.0596
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1036P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1397
_refine_ls_wR_factor_ref         0.1679
_reflns_number_gt                4198
_reflns_number_total             6669
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0cc01434f.txt
_cod_data_source_block           cuipph_cubic_300k
_cod_database_code               7112996