Mechanically Flexible Organic Crystals Achieved by Introducing Weak Interactions in Structure: Supramolecular Shape Synthons.
Krishna, Gamidi Rama; Devarapalli, Ramesh; Lal, Garima; Reddy, C. Malla; Journal of the American Chemical Society 138 (2016) 13561–13567; doi:10.1021/jacs.6b05118

data_4130604
_publ_section_title
;
 Mechanically Flexible Organic Crystals Achieved by Introducing Weak
 Interactions in Structure: Supramolecular Shape Synthons.
;
_journal_issue                   41
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13561
_journal_page_last               13567
_journal_paper_doi               10.1021/jacs.6b05118
_journal_volume                  138
_journal_year                    2016
_chemical_formula_moiety         'C20 H18 N2 O4'
_chemical_formula_sum            'C20 H18 N2 O4'
_chemical_formula_weight         350.36
_space_group_IT_number           61
_space_group_name_Hall           '-P 2ac 2ab'
_space_group_name_H-M_alt        'P b c a'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   6.9622(4)
_cell_length_b                   17.2426(11)
_cell_length_c                   27.5809(15)
_cell_measurement_reflns_used    2389
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      25.2440
_cell_measurement_theta_min      2.3490
_cell_volume                     3311.0(3)
_computing_cell_refinement       'CrysAlisPro, Agilent Technologies'
_computing_data_collection       'CrysAlisPro, Agilent Technologies'
_computing_data_reduction        'CrysAlisPro, Agilent Technologies'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Eos'
_diffrn_measurement_method       '\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  0.0289
_diffrn_reflns_av_sigmaI/netI    0.0369
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -3
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            6193
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.36
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.965
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; BRUKER, 2008'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.406
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1472
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.197
_refine_diff_density_min         -0.240
_refine_diff_density_rms         0.052
_refine_ls_extinction_coef       0.0022(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         2913
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0534
_refine_ls_R_factor_gt           0.0415
_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^)+(0.0559P)^2^+0.6804P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1081
_refine_ls_wR_factor_ref         0.1181
_reflns_number_gt                2298
_reflns_number_total             2913
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja6b05118_si_007.cif
_cod_data_source_block           1b
_cod_database_code               4130604