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#$Date: 2016-09-30 13:16:14 +0300 (Fri, 30 Sep 2016) $
#$Revision: 186852 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/54/42/1544223.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_1544223
loop_
_publ_author_name
'Olejniczak, Anna'
'Ostrowska, Kinga'
'Katrusiak, Andrzej'
_publ_contact_author_address
;Faculty of Chemistry,
Adam Mickiewicz University,
Grunwaldzka 6, 60-780 Poznan
Poland
;
_publ_contact_author_email       katran@amu.edu.pl
_publ_contact_author_fax         +48(61)8658008
_publ_contact_author_name        'Andrzej Katrusiak'
_publ_contact_author_phone       +48(61)8291443
_publ_section_title
;
 H-Bond Breaking in High-Pressure Urea
;
_journal_issue                   35
_journal_name_full               'The Journal of Physical Chemistry C'
_journal_page_first              15761
_journal_paper_doi               10.1021/jp904942c
_journal_volume                  113
_journal_year                    2009
_chemical_formula_moiety         'C H4 N2 O'
_chemical_formula_sum            'C H4 N2 O'
_chemical_formula_weight         60.06
_chemical_melting_point          405
_chemical_name_common            urea
_chemical_name_systematic
; 
 urea 
;
_space_group_IT_number           113
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P -4 2ab'
_symmetry_space_group_name_H-M   'P -4 21 m'
_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            2
_cell_length_a                   5.589(6)
_cell_length_b                   5.589(6)
_cell_length_c                   4.680(5)
_cell_measurement_pressure       470000
_cell_measurement_reflns_used    110
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      29.33
_cell_measurement_theta_min      4.36
_cell_volume                     146.2(3)
_computing_cell_refinement       'CrysAlis (Oxford Diffraction, 2002)'
_computing_data_collection       'CrysAlis (Oxford Diffraction, 2002)'
_computing_data_reduction        'CrysAlis (Oxford Diffraction, 2002)'
_computing_molecular_graphics
;X-Seed (Barbour, 2001) 
and POV-Ray (Persistence of Vision, 2004)
;
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 16.4
_diffrn_measured_fraction_theta_full 0.466
_diffrn_measured_fraction_theta_max 0.466
_diffrn_measurement_device_type  'Kuma KM4CCD κ geometry'
_diffrn_measurement_method
;HP omega scans - for more details see:
A. Budzianowski, A. Katrusiak in High-Pressure Crystallography
(Eds.: A. Katrusiak, P. F. McMillan),
Dordrecht: Kluwer Acad. Publ., 2004 pp.157-168
;
_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  0.2582
_diffrn_reflns_av_sigmaI/netI    0.1089
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            744
_diffrn_reflns_theta_full        29.33
_diffrn_reflns_theta_max         29.33
_diffrn_reflns_theta_min         4.36
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_T_max  0.95
_exptl_absorpt_correction_T_min  0.61
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
Katrusiak, A. (2003). REDSHABS - Program for correcting
reflections intensities for DAC absorption, gasket shadowing
and sample crystal absorption. Adam Mickiewicz University, Poznan.
Katrusiak, A. (2004). Z. Kristallogr. 219, 461-467
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.365
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             64
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.48
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.160
_refine_diff_density_min         -0.193
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   10(10)
_refine_ls_extinction_coef       2.1(18)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.273
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     16
_refine_ls_number_reflns         110
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.273
_refine_ls_R_factor_all          0.0711
_refine_ls_R_factor_gt           0.0645
_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)+(0.1428P)²+0.0108P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2434
_refine_ls_wR_factor_ref         0.2572
_reflns_number_gt                87
_reflns_number_total             110
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            urea.cif
_cod_data_source_block           urea_047
_cod_original_cell_volume        146.1(3)
_cod_original_sg_symbol_Hall     'P -42ab'
_cod_original_sg_symbol_H-M      'P -421m'
_cod_database_code               1544223
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, z'
'y, -x, -z'
'-y, x, -z'
'-x+1/2, y+1/2, -z'
'x+1/2, -y+1/2, -z'
'-y+1/2, -x+1/2, z'
'y+1/2, x+1/2, z'
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
_atom_site_disorder_assembly
_atom_site_disorder_group
C1 C 0.0000 0.5000 0.3211(18) 0.055(3) Uani 1 4 d S . .
N1 N 0.1466(12) 0.6466(12) 0.1807(10) 0.094(4) Uani 1 2 d S . .
H1A H 0.2404 0.7404 0.2738 0.113 Uiso 1 2 calc SR . .
H1B H 0.1474 0.6474 -0.0031 0.113 Uiso 1 2 calc SR . .
O1 O 0.0000 0.5000 0.5986(9) 0.073(3) Uani 1 4 d S . .
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
C1 0.064(3) 0.064(3) 0.035(3) 0.000 0.000 -0.001(5)
N1 0.124(6) 0.124(6) 0.034(3) -0.0060(18) -0.0060(18) -0.042(6)
O1 0.093(4) 0.093(4) 0.031(3) 0.000 0.000 0.014(6)
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'
O O 0.0106 0.0060 '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
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
O1 C1 N1 119.6(4) . 2_565
O1 C1 N1 119.6(4) . .
N1 C1 N1 120.9(9) 2_565 .
C1 N1 H1A 120.0 . .
C1 N1 H1B 120.0 . .
H1A N1 H1B 120.0 . .
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
C1 O1 1.299(10) .
C1 N1 1.332(10) 2_565
C1 N1 1.332(10) .
N1 H1A 0.8600 .
N1 H1B 0.8600 .
