Polymorphism of Cinnamic and α-Truxillic Acids: New Additions to an Old Story†
Abdelmoty, Iman; Buchholz, Vera; Di, Li; Guo, Chengyun; Kowitz, Kathleen; Enkelmann, Volker; Wegner, Gerhard; Foxman, Bruce M.; Crystal Growth & Design 5 (2005) 2210–; doi:10.1021/cg050160s

data_4505187
_publ_section_title
;
 Polymorphism of Cinnamic and \a-Truxillic Acids:&#x2009; New Additions to
 an Old Story&#x2020;
;
_journal_issue                   6
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              2210
_journal_paper_doi               10.1021/cg050160s
_journal_volume                  5
_journal_year                    2005
_chemical_formula_moiety         'C18 H16 O4'
_chemical_formula_sum            'C18 H16 O4'
_chemical_formula_weight         296.32
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             05-03-14
_audit_creation_method           CRYSTALS_ver_12.80
_cell_angle_alpha                90
_cell_angle_beta                 99.615(6)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.9958(12)
_cell_length_b                   5.6586(5)
_cell_length_c                   16.3091(12)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    294
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_volume                     1455.5(2)
_computing_cell_refinement       'CAD4 Express, (Straver, 1992)'
_computing_data_collection       'CAD4 Express, (Straver, 1992)'
_computing_data_reduction        'RC93 (Watkin, Prout & Lilley, 1994)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'USER DEFINED STRUCTURE SOLUTION'
_diffrn_ambient_temperature      294
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Enraf-Nonius CAD4'
_diffrn_measurement_method       \w/2\q
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54180
_diffrn_reflns_av_R_equivalents  0.005
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            1640
_diffrn_reflns_theta_full        76.784
_diffrn_reflns_theta_max         76.784
_diffrn_reflns_theta_min         5.502
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.782
_exptl_absorpt_correction_T_max  0.94
_exptl_absorpt_correction_T_min  0.81
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
; 
 Azimutal absorption correction (North et al., 1968) 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.352
_exptl_crystal_description       plate
_exptl_crystal_F_000             624
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.13
_refine_diff_density_min         -0.13
_refine_ls_extinction_coef       26(3)
_refine_ls_extinction_method
'Larson 1970 Crystallographic Computing eq 22'
_refine_ls_goodness_of_fit_ref   1.0407
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     260
_refine_ls_number_reflns         1299
_refine_ls_number_restraints     19
_refine_ls_R_factor_all          0.0426
_refine_ls_R_factor_gt           0.0349
_refine_ls_shift/su_max          0.003648
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 2.38 1.77 1.47 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0509
_refine_ls_wR_factor_gt          0.0447
_refine_ls_wR_factor_ref         0.0447
_reflns_limit_h_max              20
_reflns_limit_h_min              0
_reflns_limit_k_max              7
_reflns_limit_k_min              0
_reflns_limit_l_max              20
_reflns_limit_l_min              -20
_reflns_number_gt                1299
_reflns_number_total             1541
_reflns_threshold_expression     I>1.96u(I)
_oxford_diffrn_Wilson_B_factor   4.26
_oxford_diffrn_Wilson_scale      0.51
_oxford_refine_ls_scale          2.520(8)
_oxford_structure_analysis_title TRUXL2
_cod_data_source_file            cg050160ssi20050418_011742.cif
_cod_data_source_block           Compound_2c
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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_sg_symbol_H-M      'C 1 2/c 1 '
_cod_database_code               4505187