Synthon identification in co-crystals and polymorphs with IR spectroscopy. Primary amides as a case study
Mukherjee, Arijit; Tothadi, Srinu; Chakraborty, Shaunak; Ganguly, Somnath; Desiraju, Gautam R.; CrystEngComm 15 (2013) 4640–; doi:10.1039/c3ce40286j

data_7210156
_publ_section_title
;
 Synthon identification in co-crystals and polymorphs with IR
 spectroscopy. Primary amides as a case study
;
_journal_issue                   23
_journal_name_full               CrystEngComm
_journal_page_first              4640
_journal_paper_doi               10.1039/c3ce40286j
_journal_volume                  15
_journal_year                    2013
_chemical_formula_sum            'C7 H5 F2 N O'
_chemical_formula_weight         157.08
_chemical_name_common            2,6-Difluorobenzamide
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 112.482(11)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.1396(15)
_cell_length_b                   12.118(4)
_cell_length_c                   11.792(3)
_cell_measurement_reflns_used    6286
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.6
_cell_measurement_theta_min      3.4
_cell_volume                     678.6(3)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.0 r4 (Rigaku, 2009)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.0 r4 (Rigaku, 2009)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.0 r4 (Rigaku, 2009)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device
;
XtaLABmini: Fixed Chi 2 circle
;
_diffrn_measurement_device_type
;
Rigaku Mercury375R (2x2 bin mode)
;
_diffrn_measurement_method       'profile data from \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  0.0259
_diffrn_reflns_av_sigmaI/netI    0.0190
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            6733
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.36
_exptl_absorpt_coefficient_mu    0.141
_exptl_absorpt_correction_T_max  0.9724
_exptl_absorpt_correction_T_min  0.9590
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.537
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             320
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.334
_refine_diff_density_min         -0.195
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     108
_refine_ls_number_reflns         1555
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0393
_refine_ls_R_factor_gt           0.0355
_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^)+(0.0450P)^2^+0.2355P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0909
_refine_ls_wR_factor_ref         0.0934
_reflns_number_gt                1401
_reflns_number_total             1555
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c3ce40286j.txt
_cod_data_source_block           platon
_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/c'
_cod_database_code               7210156