High-Pressure Crystallization and Structural Transformations in CompressedR,S-Ibuprofen
Ostrowska, Kinga; Kropidłowska, Magdalena; Katrusiak, Andrzej; Crystal Growth & Design 15 (2015) 1512–; doi:10.1021/cg5018888

data_4512743
_publ_section_title
;
 High-Pressure Crystallization and Structural Transformations in
 CompressedR,S-Ibuprofen
;
_journal_issue                   3
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1512
_journal_paper_doi               10.1021/cg5018888
_journal_volume                  15
_journal_year                    2015
_chemical_formula_moiety         'C13 H18 O2'
_chemical_formula_sum            'C13 H18 O2'
_chemical_formula_weight         206.27
_chemical_melting_point          349
_chemical_name_common
;
(R,S)-2-(4-(2-methylpropyl)phenyl)propanoic acid
;
_chemical_name_systematic
;
 (R,S)-ibuprofen
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 100.13(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   14.196(5)
_cell_length_b                   7.638(3)
_cell_length_c                   10.32(2)
_cell_measurement_pressure       880000
_cell_measurement_reflns_used    751
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      22.04
_cell_measurement_theta_min      2.76
_cell_volume                     1102(2)
_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)

Mercury (2008)
;
_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 0.271
_diffrn_measured_fraction_theta_max 0.271
_diffrn_measurement_device_type  'multiwire proportional'
_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           AgK\a
_diffrn_radiation_wavelength     0.56085
_diffrn_reflns_av_R_equivalents  0.1399
_diffrn_reflns_av_sigmaI/netI    0.0967
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -4
_diffrn_reflns_number            5122
_diffrn_reflns_theta_full        22.04
_diffrn_reflns_theta_max         22.04
_diffrn_reflns_theta_min         2.76
_exptl_absorpt_coefficient_mu    0.052
_exptl_absorpt_correction_T_max  0.997
_exptl_absorpt_correction_T_min  0.990
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
Correction for absorption was made using XEMP (SHELXTL, 
Sheldrick (1990)).
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.244
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.146
_refine_diff_density_min         -0.147
_refine_diff_density_rms         0.036
_refine_ls_extinction_coef       0.07(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         751
_refine_ls_number_restraints     90
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.1782
_refine_ls_R_factor_gt           0.0830
_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^)+(0.1581P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2124
_refine_ls_wR_factor_ref         0.2736
_reflns_number_gt                355
_reflns_number_total             751
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg5018888_si_002.cif
_cod_data_source_block           ibuprofen_088
_cod_depositor_comments
;
The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 

 Adding full bibliography for 4512740--4512754.cif.
;
_cod_original_sg_symbol_Hall     '-P 2y bc'
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4512743