Density, freezing and molecular aggregation in pyridazine, pyridine and benzene
Podsiadło, Marcin; Jakóbek, Katarzyna; Katrusiak, Andrzej; CrystEngComm 12 (2010) 2561–; doi:10.1039/c001153c

data_7212507
_publ_section_title
;
 Density, freezing and molecular aggregation in pyridazine, pyridine and
 benzene
;
_journal_issue                   9
_journal_name_full               CrystEngComm
_journal_page_first              2561
_journal_paper_doi               10.1039/c001153c
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C5 H5 N'
_chemical_formula_sum            'C5 H5 N'
_chemical_formula_weight         79.10
_chemical_melting_point          231
_chemical_name_common            pyridine
_chemical_name_systematic
;
pyridine
;
_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            16
_cell_length_a                   17.267(4)
_cell_length_b                   8.7640(18)
_cell_length_c                   11.006(2)
_cell_measurement_reflns_used    12352
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      24.98
_cell_measurement_theta_min      2.36
_cell_volume                     1665.5(6)
_computing_cell_refinement       'CrysAlisRED (Oxford Diffraction, 2004)'
_computing_data_collection       'CrysAlisCCD (Oxford Diffraction, 2004)'
_computing_data_reduction
'CrysAlisRED (Oxford Diffraction, 2004); REDSHABS (Katrusiak, A. 2003)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1990)'
_computing_publication_material  'SHELXL--97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL--97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS--97 (Sheldrick, 1997)'
_diffrn_ambient_environment      'diamond-anvil cell'
_diffrn_ambient_pressure         1230000
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.734
_diffrn_measured_fraction_theta_max 0.734
_diffrn_measurement_device_type  'KM-4 CCD'
_diffrn_measurement_method       '\f- and \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  0.0985
_diffrn_reflns_av_sigmaI/netI    0.0764
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            12352
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         2.36
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.077
_exptl_absorpt_correction_T_max  0.87
_exptl_absorpt_correction_T_min  0.21
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
Correction for absorption of the diamond-anvil cell and the sample
were made using program REDSHABS (Katrusiak, A. (2003) REDSHABS. Adam
Mickiewicz University Pozna\'n; Katrusiak, A. (2004) Z. Kristallogr.
219, 461-467).
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             672
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.37
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.156
_refine_diff_density_min         -0.158
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.145
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         2143
_refine_ls_number_restraints     145
_refine_ls_restrained_S_all      1.171
_refine_ls_R_factor_all          0.1611
_refine_ls_R_factor_gt           0.0997
_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^)+(0.0914P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1960
_refine_ls_wR_factor_ref         0.2302
_reflns_number_gt                1266
_reflns_number_total             2143
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c001153c.txt
_cod_data_source_block           pir_1.23GPa
_cod_database_code               7212507