Reversible phase transition driven by order-disorder transformations of metal-halide moieties in [(C6H14)NH2]2.CuBr4
Muhammad Adnan Asghar; Shuquan Zhang; Tariq Khan; Zhihua Sun; Aurang Zeb; Chengmin Ji; Lina Li; Sangen Zhao; Junhua Luo; Journal of Materials Chemistry C 4 (2016) 7537–7540; doi:10.1039/C6TC02034H

data_7234909
_publ_section_title
;
 Reversible phase transition driven by order-disorder transformations of
 metal-halide moieties in [(C6H14)NH2]2.CuBr4
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              7537
_journal_page_last               7540
_journal_paper_doi               10.1039/C6TC02034H
_journal_volume                  4
_journal_year                    2016
_chemical_formula_sum            'C12 H32 Br4 Cu N2'
_chemical_formula_weight         587.55
_chemical_melting_point          365
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.4357(5)
_cell_length_b                   9.5934(5)
_cell_length_c                   24.6862(8)
_cell_measurement_reflns_used    6086
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.4739
_cell_measurement_theta_min      2.0061
_cell_volume                     2234.61(18)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0195
_diffrn_reflns_av_sigmaI/netI    0.0328
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            6232
_diffrn_reflns_theta_full        66.58
_diffrn_reflns_theta_max         66.58
_diffrn_reflns_theta_min         5.84
_exptl_absorpt_coefficient_mu    9.687
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.746
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2496
_exptl_crystal_preparation       'Phase Transitions'
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: ethanol'
_refine_diff_density_max         0.323
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.051
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.02(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         3607
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0509
_refine_ls_R_factor_gt           0.0334
_refine_ls_shift/su_max          0.019
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0326P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0702
_refine_ls_wR_factor_ref         0.0788
_reflns_number_gt                2709
_reflns_number_total             3943
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            J-Mater-Chem-C-2016-4-7537.cif
_cod_data_source_block           2
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               7234909