#------------------------------------------------------------------------------
#$Date: 2017-04-06 11:28:47 +0300 (Thu, 06 Apr 2017) $
#$Revision: 195238 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/31/10/2311084.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2311084
loop_
_publ_author_name
'van Genderen, E.'
'Clabbers, M. T. B.'
'Das, P. P.'
'Stewart, A.'
'Nederlof, I.'
'Barentsen, K. C.'
'Portillo, Q.'
'Pannu, N. S.'
'Nicolopoulos, S.'
'Gruene, T.'
'Abrahams, J. P.'
_publ_section_title
;
 Ab initio structure determination of nanocrystals of organic
 pharmaceutical compounds by electron diffraction at room temperature
 using a Timepix quantum area direct electron detector
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section A'
_journal_page_first              236
_journal_page_last               242
_journal_paper_doi               10.1107/S2053273315022500
_journal_volume                  72
_journal_year                    2016
_chemical_formula_sum            'C6 H5 N O2'
_chemical_formula_weight         123.12
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/8
_cell_angle_alpha                90
_cell_angle_beta                 114.45(14)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.41(3)
_cell_length_b                   11.692(2)
_cell_length_c                   7.377(11)
_cell_measurement_temperature    293(2)
_cell_volume                     582(3)
_computing_structure_refinement  'SHELXL-2014/8 (Sheldrick, 2014)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.392
_diffrn_measured_fraction_theta_max 0.390
_diffrn_measurement_device_type
;
 Philips EM30 LaB6 Electron Microscope with Timepix Detector
;
_diffrn_radiation_type           electron
_diffrn_radiation_wavelength     0.02508
_diffrn_reflns_av_R_equivalents  0.2703
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            1337
_diffrn_reflns_theta_full        0.862
_diffrn_reflns_theta_max         0.953
_diffrn_reflns_theta_min         0.123
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_type   empirical
_exptl_crystal_density_diffrn    1.406
_exptl_crystal_description       'data merged from 2 nanocrystals'
_exptl_crystal_F_000             256
_refine_diff_density_max         0.550
_refine_diff_density_min         -0.816
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   2.216
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     39
_refine_ls_number_reflns         552
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      2.216
_refine_ls_R_factor_all          0.4019
_refine_ls_R_factor_gt           0.3371
_refine_ls_shift/su_max          1.088
_refine_ls_shift/su_mean         0.028
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[σ²(Fo²)+(0.2000P)²] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.6328
_refine_ls_wR_factor_ref         0.6754
_reflns_number_gt                303
_reflns_number_total             552
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            td5026sup1.cif
_cod_data_source_block           nicotinic_acid_2x-merged
_cod_depositor_comments
;
Adding full bibliography for 2311081--2311085.cif.

2017-03-30
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_formula_sum            'C H0.83 N0.17 O0.33'
_cod_original_formula_weight         20.52
_cod_original_formula_units_Z            24
_cod_original_cell_volume        581(2)
_cod_database_code               2311084
_cod_database_fobs_code          2311084
_shelx_space_group_comment
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x, y+1/2, -z+1/2'
'-x, -y, -z'
'x, -y-1/2, z-1/2'
loop_
_atom_site_type_symbol
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_calc_flag
_atom_site_occupancy
C C6 0.638(5) 0.5758(11) 0.292(2) 0.038(3) Uiso d 1
C C1 0.655(5) 0.7931(12) 0.279(2) 0.045(4) Uiso d 1
H H1 0.5230 0.7977 0.2588 0.054 Uiso calc 1
O O1 0.447(5) 0.5868(12) 0.249(2) 0.065(4) Uiso d 1
H HO 0.3923 0.5244 0.2173 0.00(2) Uiso calc 1
N N1 0.770(5) 0.8912(11) 0.289(2) 0.046(4) Uiso d 1
O O2 0.702(6) 0.4865(16) 0.299(3) 0.087(6) Uiso d 1
C C2 0.758(6) 0.6834(13) 0.302(3) 0.049(4) Uiso d 1
C C5 0.952(6) 0.8795(13) 0.334(2) 0.048(4) Uiso d 1
H H5 1.0262 0.9453 0.3455 0.058 Uiso calc 1
C C4 1.047(7) 0.7770(16) 0.366(3) 0.063(5) Uiso d 1
H H2 1.1840 0.7780 0.4048 0.075 Uiso calc 1
C C3 0.960(5) 0.6757(12) 0.345(2) 0.044(4) Uiso d 1
H H3 1.0266 0.6066 0.3577 0.053 Uiso calc 1
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
O2 C6 O1 119(3)
O2 C6 C2 122(3)
O1 C6 C2 118.5(18)
N1 C1 C2 116(3)
N1 C1 H1 122.1
C2 C1 H1 122.1
C6 O1 HO 109.5
C5 N1 C1 118.8(17)
C3 C2 C1 123(2)
C3 C2 C6 120.4(17)
C1 C2 C6 117(3)
N1 C5 C4 125(3)
N1 C5 H5 117.7
C4 C5 H5 117.7
C3 C4 C5 125(4)
C3 C4 H2 117.6
C5 C4 H2 117.6
C4 C3 C2 113(3)
C4 C3 H3 123.4
C2 C3 H3 123.4
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
C6 O2 1.14(3)
C6 O1 1.32(5)
C6 C2 1.53(3)
C1 N1 1.41(3)
C1 C2 1.46(3)
C1 H1 0.9300
O1 HO 0.8200
N1 C5 1.26(5)
C2 C3 1.40(5)
C5 C4 1.36(4)
C5 H5 0.9300
C4 C3 1.33(3)
C4 H2 0.9300
C3 H3 0.9300
