#------------------------------------------------------------------------------
#$Date: 2019-11-22 19:03:52 +0200 (Fri, 22 Nov 2019) $
#$Revision: 231268 $
#$URL: file:///home/coder/svn-repositories/cod/cif/4/51/63/4516362.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_4516362
loop_
_publ_author_name
'Patyk, Ewa'
'Podsiadło, Marcin'
'Katrusiak, Andrzej'
_publ_section_title
;
 CH···N Bonds and Dynamics in Isostructural
 Pyrimidine Polymorphs
;
_journal_issue                   8
_journal_name_full               'Crystal Growth & Design'
_journal_page_first              4039
_journal_paper_doi               10.1021/acs.cgd.5b00657
_journal_volume                  15
_journal_year                    2015
_chemical_formula_moiety         'C4 H4 N2'
_chemical_formula_sum            'C4 H4 N2'
_chemical_formula_weight         80.09
_chemical_melting_point          293.15
_chemical_name_common            pyrimidine
_chemical_name_systematic
; 
pyrimidine phase IV
;
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 90.39(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.171(9)
_cell_length_b                   9.245(4)
_cell_length_c                   3.5885(16)
_cell_measurement_reflns_used    1461
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      27.19
_cell_measurement_theta_min      4.41
_cell_volume                     370.6(4)
_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         1260000
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.228
_diffrn_measured_fraction_theta_max 0.228
_diffrn_measurement_device_type  'KM-4 CCD'
_diffrn_measurement_method       'φ- and ω-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  0.0712
_diffrn_reflns_av_sigmaI/netI    0.0211
_diffrn_reflns_limit_h_max       3
_diffrn_reflns_limit_h_min       -3
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -4
_diffrn_reflns_number            1461
_diffrn_reflns_theta_full        27.19
_diffrn_reflns_theta_max         27.19
_diffrn_reflns_theta_min         4.41
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.91
_exptl_absorpt_correction_T_min  0.52
_exptl_absorpt_correction_type   analytical
_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 Poznań; Katrusiak, A. (2004) Z. Kristallogr.
 219, 461-467).
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.435
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cylinder
_exptl_crystal_F_000             168
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.107
_refine_diff_density_min         -0.118
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.162
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     55
_refine_ls_number_reflns         188
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.162
_refine_ls_R_factor_all          0.0886
_refine_ls_R_factor_gt           0.0649
_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/[σ²(Fo²)+(0.1506P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1843
_refine_ls_wR_factor_ref         0.2122
_reflns_number_gt                133
_reflns_number_total             188
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg5b00657_si_002.cif
_cod_data_source_block           phaseIV_1.26GPa
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4516362
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x+1/2, y+1/2, -z+1/2'
'-x, -y, -z'
'x-1/2, -y-1/2, z-1/2'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
N1 N 0.137(2) 0.3702(9) -0.053(2) 0.06(2) Uani 1 1 d .
N3 N 0.016(2) 0.1806(7) 0.224(2) 0.07(2) Uani 1 1 d .
C2 C 0.028(3) 0.3151(15) 0.095(3) 0.07(2) Uani 1 1 d .
H2 H -0.0377 0.3760 0.1028 0.086 Uiso 1 1 calc R
C4 C 0.111(4) 0.0961(10) 0.202(3) 0.08(2) Uani 1 1 d .
H4 H 0.1048 0.0013 0.2873 0.098 Uiso 1 1 calc R
C5 C 0.215(4) 0.1411(16) 0.064(2) 0.06(2) Uani 1 1 d .
H5 H 0.2803 0.0796 0.0504 0.076 Uiso 1 1 calc R
C6 C 0.221(4) 0.2809(11) -0.059(3) 0.05(3) Uani 1 1 d .
H6 H 0.2938 0.3121 -0.1545 0.061 Uiso 1 1 calc R
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
C6 N1 C2 114.3(11)
C4 N3 C2 117(3)
N3 C2 N1 124(3)
N3 C4 C5 122.5(11)
C4 C5 C6 118(4)
N1 C6 C5 125(4)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
N1 C6 1.25(4)
N1 C2 1.42(5)
N3 C4 1.31(5)
N3 C2 1.333(16)
C4 C5 1.33(6)
C5 C6 1.367(19)
