Highly Flexible Molecule "Chameleon": Reversible Thermochromism and Phase Transitions in Solid Copper(II) Diiminate Cu[CF3-C(NH)-CF=C(NH)-CF3]2
Victor N. Khrustalev; Svetlana O. Kostenko; Mikhail I. Buzin; Alexander A. Korlyukov; Yan V. Zubavichus; Michael A. Kurykin; Mikhail Yu. Antipin; Inorganic Chemistry 51 (2012) 10590–10602; doi:10.1021/ic300814w

data_4330577
_publ_section_title
;
 Highly Flexible Molecule "Chameleon": Reversible Thermochromism and Phase
 Transitions in Solid Copper(II) Diiminate Cu[CF3-C(NH)-CF=C(NH)-CF3]2
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              10590
_journal_page_last               10602
_journal_paper_doi               10.1021/ic300814w
_journal_volume                  51
_journal_year                    2012
_chemical_formula_moiety         'C10 H4 Cu F14 N4'
_chemical_formula_sum            'C10 H4 Cu F14 N4'
_chemical_formula_weight         509.71
_space_group_IT_number           86
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4bc'
_symmetry_space_group_name_H-M   'P 42/n :2'
_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            4
_cell_length_a                   16.7731(3)
_cell_length_b                   16.7731(3)
_cell_length_c                   5.5775(2)
_cell_measurement_reflns_used    6431
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.77
_cell_measurement_theta_min      2.43
_cell_volume                     1569.16(7)
_computing_cell_refinement       'SAINTPlus, v. 6.2 (Bruker, 2001)'
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        'SAINTPlus, v. 6.2 (Bruker, 2001)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXTL (Sheldrick, 2008)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0287
_diffrn_reflns_av_sigmaI/netI    0.0154
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            17633
_diffrn_reflns_theta_full        30.02
_diffrn_reflns_theta_max         30.02
_diffrn_reflns_theta_min         1.72
_exptl_absorpt_coefficient_mu    1.554
_exptl_absorpt_correction_T_max  0.940
_exptl_absorpt_correction_T_min  0.575
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.158
_exptl_crystal_description       needle
_exptl_crystal_F_000             988
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.389
_refine_diff_density_min         -0.321
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.002
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     133
_refine_ls_number_reflns         2284
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.002
_refine_ls_R_factor_all          0.0446
_refine_ls_R_factor_gt           0.0303
_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^)+(0.0354P)^2^+2.08P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0700
_refine_ls_wR_factor_ref         0.0840
_reflns_number_gt                1749
_reflns_number_total             2284
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ic300814w_si_001_6.cif
_cod_data_source_block           VI_gamma2
_cod_original_sg_symbol_H-M      'P 42/n'
_cod_database_code               4330577