Insights into H-aggregates and CH⋯O hydrogen bond mediated self-assembly of pyromellitic bisimide
Jana, Poulami; Maity, Sibaprasad; Maity, Suman Kumar; Ghorai, Pradip Kumar; Haldar, Debasish; CrystEngComm 14 (2012) 6586–; doi:10.1039/c2ce25778e

data_7208752
_publ_section_title
;
 Insights into H-aggregates and CH&#x22EF;O hydrogen bond mediated
 self-assembly of pyromellitic bisimide
;
_journal_issue                   20
_journal_name_full               CrystEngComm
_journal_page_first              6586
_journal_paper_doi               10.1039/c2ce25778e
_journal_volume                  14
_journal_year                    2012
_chemical_absolute_configuration syn
_chemical_formula_moiety         'C24 H28 N2 O8'
_chemical_formula_sum            'C24 H28 N2 O8'
_chemical_formula_weight         472.48
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 91.229(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.3430(11)
_cell_length_b                   10.4839(11)
_cell_length_c                   11.3463(12)
_cell_measurement_reflns_used    5348
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.000
_cell_measurement_theta_min      2.64
_cell_volume                     1230.1(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (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  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0333
_diffrn_reflns_av_sigmaI/netI    0.0475
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            10770
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         1.80
_exptl_absorpt_coefficient_mu    0.096
_exptl_absorpt_correction_T_max  0.986
_exptl_absorpt_correction_T_min  0.977
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, bruker-2008'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.276
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             500
_exptl_crystal_size_max          .4
_exptl_crystal_size_mid          .2
_exptl_crystal_size_min          .15
_refine_diff_density_max         0.490
_refine_diff_density_min         -0.302
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.001(1)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     313
_refine_ls_number_reflns         5067
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0534
_refine_ls_R_factor_gt           0.0468
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0672P)^2^+0.4966P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1211
_refine_ls_wR_factor_ref         0.1260
_reflns_number_gt                4568
_reflns_number_total             5067
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce25778e.txt
_cod_data_source_block           pj
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'multi scan' changed to
'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               7208752