#------------------------------------------------------------------------------
#$Date: 2025-08-21 02:19:08 +0200 (Thu 21 de Aug de 2025) $
#$Revision: 301842 $
#$URL: svn://www.crystallography.net/cod/cif/4/50/40/4504086.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_4504086
loop_
_publ_author_name
'Fabbiani, Francesca P. A.'
'Allan, David R.'
'David, William I. F.'
'Davidson, Alistair J.'
'Lennie, Alistair R.'
'Parsons, Simon'
'Pulham, Colin R.'
'Warren, John E.'
_publ_section_title
;
 High-Pressure Studies of Pharmaceuticals:&#x00A0; An Exploration of the
 Behavior of Piracetam
;
_journal_issue                   6
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1115
_journal_paper_doi               10.1021/cg0607710
_journal_volume                  7
_journal_year                    2007
_chemical_compound_source        F.P.A.Fabbiani
_chemical_formula_moiety         'C6 H10 N2 O2'
_chemical_formula_sum            'C6 H10 N2 O2'
_chemical_formula_weight         142.16
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     'Known fractional coordinates'
_audit_creation_date             05-06-03
_audit_creation_method           CRYSTALS_ver_12.80
_cell_angle_alpha                80.77(3)
_cell_angle_beta                 114.69(2)
_cell_angle_gamma                91.12(2)
_cell_formula_units_Z            2
_cell_length_a                   6.263(2)
_cell_length_b                   6.2063(10)
_cell_length_c                   8.412(3)
_cell_measurement_reflns_used    524
_cell_measurement_temperature    293
_cell_measurement_theta_max      24
_cell_measurement_theta_min      3
_cell_volume                     292.83(16)
_computing_cell_refinement       'SAINT (Siemens ,1995)'
_computing_data_collection       'SMART (Siemens, 1993)'
_computing_data_reduction        'SAINT (Siemens ,1995)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material
'CRYSTALS (Betteridge et al., 2003), PLATON, XCIF, ENCIFER'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'Known fractional coordinates'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.277
_diffrn_measured_fraction_theta_max 0.277
_diffrn_measurement_device_type  'Bruker SMART'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.67650
_diffrn_reflns_av_R_equivalents  0.0550
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       5
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            945
_diffrn_reflns_theta_full        25.017
_diffrn_reflns_theta_max         25.017
_diffrn_reflns_theta_min         3.170
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.123
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.06
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'based on symmetry-related measuraments'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.612
_exptl_crystal_description       block
_exptl_crystal_F_000             152
_exptl_crystal_recrystallization_method
'Compression of Form II ex 2-propanol at 2.5 GPa'
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.34
_refine_diff_density_min         -0.29
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0634
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     41
_refine_ls_number_reflns         321
_refine_ls_number_restraints     23
_refine_ls_R_factor_all          0.1023
_refine_ls_R_factor_gt           0.0882
_refine_ls_shift/su_max          0.000057
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 Method= Modified Sheldrick 
 w=1/[\s^2^(F^2^) + ( 0.10P)^2^ + 1.17P] 
 ,where P=(max(Fo^2^,0) + 2Fc^2^)/3 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.2185
_refine_ls_wR_factor_gt          0.2080
_refine_ls_wR_factor_ref         0.2185
_reflns_limit_h_max              7
_reflns_limit_h_min              -7
_reflns_limit_k_max              7
_reflns_limit_k_min              -7
_reflns_limit_l_max              5
_reflns_limit_l_min              0
_reflns_number_gt                257
_reflns_number_total             332
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   1.59
_oxford_diffrn_Wilson_scale      0.01
_oxford_refine_ls_scale          8.3(19)
_oxford_structure_analysis_title 'piracetam form V at 2.5 GPa'
_cod_data_source_file            cg0607710si20061031_114637.cif
_cod_data_source_block           piracetam_form_V_2.5_GPa
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        292.81(17)
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               4504086
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-x,-y,-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_occupancy
_atom_site_adp_type
_atom_site_refinement_flags_posn
C1 C 1.1593(10) 0.3787(9) 0.3454(16) 0.0197(17) 1.0000 Uiso D
N1 N 0.9418(9) 0.4275(8) 0.3265(14) 0.0184(15) 1.0000 Uiso D
O1 O 1.2713(9) 0.2009(8) 0.4223(15) 0.0274(15) 1.0000 Uiso D
C2 C 1.2385(11) 0.5655(12) 0.2540(19) 0.0262(19) 1.0000 Uiso D
N2 N 0.4658(11) 0.0617(10) 0.2039(17) 0.0287(18) 1.0000 Uiso D
O2 O 0.7274(10) 0.1690(10) 0.0839(19) 0.0348(19) 1.0000 Uiso D
C3 C 1.0406(11) 0.7411(11) 0.1767(19) 0.0235(19) 1.0000 Uiso D
C4 C 0.8385(11) 0.6364(12) 0.2102(19) 0.0242(18) 1.0000 Uiso D
C5 C 0.7959(11) 0.2669(11) 0.3644(15) 0.0193(17) 1.0000 Uiso D
C6 C 0.6605(11) 0.1621(12) 0.2051(15) 0.0169(18) 1.0000 Uiso D
H21 H 1.3814 0.6221 0.3434 0.0314 1.0000 Uiso R
H22 H 1.2772 0.5202 0.1598 0.0314 1.0000 Uiso R
H31 H 1.0889 0.8740 0.2340 0.0283 1.0000 Uiso R
H32 H 0.9949 0.7817 0.0464 0.0283 1.0000 Uiso R
H41 H 0.7795 0.7305 0.2709 0.0291 1.0000 Uiso R
H42 H 0.7061 0.6118 0.0969 0.0291 1.0000 Uiso R
H51 H 0.8962 0.1525 0.4656 0.0230 1.0000 Uiso R
H52 H 0.6829 0.3394 0.3977 0.0230 1.0000 Uiso R
H23 H 0.4248 0.0608 0.2922 0.0349 1.0000 Uiso R
H24 H 0.3799 -0.0028 0.1136 0.0349 1.0000 Uiso R
loop_
_atom_type_symbol
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_Cromer_Mann_a1
_atom_type_scat_Cromer_Mann_b1
_atom_type_scat_Cromer_Mann_a2
_atom_type_scat_Cromer_Mann_b2
_atom_type_scat_Cromer_Mann_a3
_atom_type_scat_Cromer_Mann_b3
_atom_type_scat_Cromer_Mann_a4
_atom_type_scat_Cromer_Mann_b4
_atom_type_scat_Cromer_Mann_c
_atom_type_scat_source
C 0.0033 0.0016 2.3100 20.8439 1.0200 10.2075 1.5886 0.5687 0.8650 51.6512
0.2156 'International Tables Vol C 4.2.6.8 and 6.1.1.4'
H 0.0000 0.0000 0.4930 10.5109 0.3229 26.1257 0.1402 3.1424 0.0408 57.7998
0.0030 'International Tables Vol C 4.2.6.8 and 6.1.1.4'
N 0.0061 0.0033 12.2126 0.0057 3.1322 9.8933 2.0125 28.9975 1.1663 0.5826
-11.5290 'International Tables Vol C 4.2.6.8 and 6.1.1.4'
O 0.0106 0.0060 3.0485 13.2771 2.2868 5.7011 1.5463 0.3239 0.8670 32.9089 0.2508
'International Tables Vol C 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_publ_flag
N1 C1 O1 124.8(6) yes
N1 C1 C2 109.0(5) yes
O1 C1 C2 126.1(6) yes
C1 N1 C4 113.6(6) yes
C1 N1 C5 122.7(4) yes
C4 N1 C5 120.6(5) yes
C1 C2 C3 106.7(6) yes
C1 C2 H21 108.8 no
C3 C2 H21 109.2 no
C1 C2 H22 111.0 no
C3 C2 H22 111.6 no
H21 C2 H22 109.5 no
C6 N2 H23 120.7 no
C6 N2 H24 119.3 no
H23 N2 H24 120.0 no
C2 C3 C4 105.3(6) yes
C2 C3 H31 111.4 no
C4 C3 H31 111.4 no
C2 C3 H32 108.9 no
C4 C3 H32 110.3 no
H31 C3 H32 109.5 no
C3 C4 N1 104.4(5) yes
C3 C4 H41 110.3 no
N1 C4 H41 110.5 no
C3 C4 H42 111.3 no
N1 C4 H42 110.7 no
H41 C4 H42 109.5 no
N1 C5 C6 110.5(7) yes
N1 C5 H51 109.4 no
C6 C5 H51 109.4 no
N1 C5 H52 108.9 no
C6 C5 H52 109.2 no
H51 C5 H52 109.5 no
C5 C6 N2 115.5(7) yes
C5 C6 O2 120.8(6) yes
N2 C6 O2 123.6(6) yes
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_publ_flag
C1 N1 1.338(9) yes
C1 O1 1.245(7) yes
C1 C2 1.481(14) yes
N1 C4 1.468(10) yes
N1 C5 1.427(12) yes
C2 C3 1.516(8) yes
C2 H21 1.000 no
C2 H22 1.000 no
N2 C6 1.356(11) yes
N2 H23 0.880 no
N2 H24 0.880 no
O2 C6 1.25(2) yes
C3 C4 1.520(16) yes
C3 H31 1.000 no
C3 H32 1.000 no
C4 H41 1.000 no
C4 H42 1.000 no
C5 C6 1.499(10) yes
C5 H51 1.000 no
C5 H52 1.000 no
loop_
_cod_related_entry_id
_cod_related_entry_database
_cod_related_entry_code
1 ChemSpider 4677
2 PubChem 4843
