Control and interconversion of cocrystal stoichiometry in grinding: stepwise mechanism for the formation of a hydrogen-bonded cocrystal
Karki, Shyam; Friščić, Tomislav; Jones, William; CrystEngComm 11 (2009) 470–; doi:10.1039/b812531g

data_7200295
_publ_section_title
;
 Control and interconversion of cocrystal stoichiometry in grinding:
 stepwise mechanism for the formation of a hydrogen-bonded cocrystal
;
_journal_issue                   3
_journal_name_full               CrystEngComm
_journal_page_first              470
_journal_paper_doi               10.1039/b812531g
_journal_volume                  11
_journal_year                    2009
_chemical_absolute_configuration
;
1133 Friedel pairs were averaged for the refinement.
;
_chemical_formula_moiety         'C6 H6 N2 O, C9 H16 O4'
_chemical_formula_sum            'C15 H22 N2 O5'
_chemical_formula_weight         310.35
_chemical_name_common            'nicotinamide:azelaic acid 2:1'
_chemical_name_systematic
;
nicotinamide:azelaic acid 2:1
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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            4
_cell_length_a                   8.64550(10)
_cell_length_b                   36.5695(6)
_cell_length_c                   5.20210(10)
_cell_measurement_reflns_used    23872
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.00
_cell_volume                     1644.70(5)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius B.V. 1998)'
_computing_data_reduction
;
HKL Denzo and Scalepack (Otwinowski & Minor 1997)
;
_computing_publication_material  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick 1997)'
_computing_structure_solution    'SIR-92 (Altomare et al. 1994)'
_diffrn_ambient_temperature      180(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       'Thin slice \w and \f scans'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0363
_diffrn_reflns_av_sigmaI/netI    0.0335
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       41
_diffrn_reflns_limit_k_min       -47
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            10952
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.65
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.998
_exptl_absorpt_correction_T_min  0.937
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
multi-scan from symmetry-related measurements
Sortav (Blessing 1995)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.196
_refine_diff_density_min         -0.147
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.060
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     205
_refine_ls_number_reflns         2082
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.060
_refine_ls_R_factor_all          0.0619
_refine_ls_R_factor_gt           0.0408
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0489P)^2^+0.3144P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0961
_refine_ls_wR_factor_ref         0.1065
_reflns_number_gt                1620
_reflns_number_total             2082
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b812531g.txt
_cod_data_source_block           (na).(aze)
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               7200295