Pressure-and Temperature Induced Phase Transitions, Piezochromism, NLC Behaviour and Pressure Controlled Jahn-Teller Switching in a Cu-based Framework
McMonagle, Charlie; Comar, Priyanka; Nichol, Gary Stephen; Allan, David Robert; Barreda-Argūeso, José A; Gonzalez, Jesus Antonio; Rodriguez, Fernando; Valiente, Rafael; Turner, Gemma; Brechin, Euan K.; Moggach, Stephen A.; Chemical Science  (2020) –; doi:10.1039/D0SC03229H

data_1558703
_publ_section_title
;
 Pressure-and Temperature Induced Phase Transitions, Piezochromism, NLC
 Behaviour and Pressure Controlled Jahn-Teller Switching in a Cu-based
 Framework
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D0SC03229H
_journal_year                    2020
_chemical_formula_moiety         'C18 H16 Cu1 N2 O4'
_chemical_formula_sum            'C18 H16 Cu N2 O4'
_chemical_formula_weight         387.88
_space_group_IT_number           148
_space_group_name_Hall           '-R 3'
_space_group_name_H-M_alt        'R -3 :H'
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_H-M   'R -3 :H'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_audit_creation_date             2016-06-08
_audit_creation_method           CRYSTALS_ver_14.61_build_5965
_audit_update_record
;
2020-06-09 deposited with the CCDC.	2020-07-30 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            9
_cell_length_a                   24.8906(16)
_cell_length_b                   24.8906(16)
_cell_length_c                   7.7570(5)
_cell_measurement_reflns_used    3468
_cell_measurement_temperature    293
_cell_measurement_theta_max      16
_cell_measurement_theta_min      2
_cell_volume                     4161.9(5)
_computing_cell_refinement       'USER DEFINED CELL REFINEMENT'
_computing_data_collection       'USER DEFINED DATA COLLECTION'
_computing_data_reduction        'Apex2 (Bruker AXS, 2006)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SHELXS 86 (Sheldrick, 1986)'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.857
_diffrn_measured_fraction_theta_max 0.857
_diffrn_measurement_device       Serial
_diffrn_measurement_device_type  Unknown
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.071
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            7979
_diffrn_reflns_theta_full        26.354
_diffrn_reflns_theta_max         26.354
_diffrn_reflns_theta_min         2.791
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.204
_exptl_absorpt_correction_T_max  0.89
_exptl_absorpt_correction_T_min  0.67
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Siemens, 1996)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.393
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1791
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.100
_refine_diff_density_max         1.34
_refine_diff_density_min         -1.57
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0283
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     115
_refine_ls_number_reflns         1599
_refine_ls_number_restraints     126
_refine_ls_R_factor_all          0.1138
_refine_ls_R_factor_gt           0.0802
_refine_ls_shift/su_max          0.0000979
_refine_ls_shift/su_mean         0.0000113
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 36.5 37.4 12.4 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1519
_refine_ls_wR_factor_gt          0.1257
_refine_ls_wR_factor_ref         0.1517
_reflns_limit_h_max              14
_reflns_limit_h_min              -30
_reflns_limit_k_max              31
_reflns_limit_k_min              0
_reflns_limit_l_max              9
_reflns_limit_l_min              0
_reflns_number_gt                1146
_reflns_number_total             1623
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   2.66
_oxford_diffrn_Wilson_scale      14.00
_oxford_refine_ls_r_factor_ref   0.1135
_oxford_refine_ls_scale          0.2821(6)
_oxford_reflns_number_all        1600
_oxford_reflns_threshold_expression_ref I>-3.0\s(I)
_oxford_structure_analysis_title 'late05_0m_a.res in R-3'
_cod_data_source_file            d0sc03229h2.cif
_cod_data_source_block           MeOH_278_Syn
_cod_original_cell_volume        4161.9(6)
_cod_original_sg_symbol_H-M      'R -3 '
_cod_original_formula_sum        'C18 H16 Cu1 N2 O4'
_cod_database_code               1558703