Crystal engineering with acid and pyridine heteromeric synthon: neutral and ionic co-crystals
Santra, Ramkinkar; Ghosh, Nayan; Biradha, Kumar; New Journal of Chemistry 32 (2008) 1673–; doi:10.1039/b803280g

data_7051970
_publ_section_title
;
 Crystal engineering with acid and pyridine heteromeric synthon:
 neutral and ionic co-crystals
;
_journal_issue                   10
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1673
_journal_paper_doi               10.1039/b803280g
_journal_volume                  32
_journal_year                    2008
_chemical_formula_sum            'C28 H26 N2 O8'
_chemical_formula_weight         518.51
_chemical_name_systematic
;
?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 128.492(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   23.612(2)
_cell_length_b                   15.0618(12)
_cell_length_c                   17.8456(15)
_cell_measurement_reflns_used    6426
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.74
_cell_measurement_theta_min      1.74
_cell_volume                     4967.4(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker-APEX-2 CCD area detector'
_diffrn_measurement_method       hemisphere
_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  0.0762
_diffrn_reflns_av_sigmaI/netI    0.0875
_diffrn_reflns_limit_h_max       30
_diffrn_reflns_limit_h_min       -31
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            35036
_diffrn_reflns_theta_full        28.74
_diffrn_reflns_theta_max         28.74
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  0.95
_exptl_absorpt_correction_T_min  0.93
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.387
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       Needle
_exptl_crystal_F_000             2176
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.325
_refine_diff_density_min         -0.245
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.942
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     337
_refine_ls_number_reflns         6426
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.942
_refine_ls_R_factor_all          0.1592
_refine_ls_R_factor_gt           0.0637
_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^)+(0.0708P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1302
_refine_ls_wR_factor_ref         0.1565
_reflns_number_gt                2963
_reflns_number_total             6426
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b803280g.txt
_cod_data_source_block           2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_cell_volume        4967.5(7)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7051970