Structural Studies of Enantiomers, Racemates, and Quasiracemates. 2-(3-Bromophenoxy)propionic Acid and 2-(3-Methoxyphenoxy)propionic Acid
Breen, Meghan E.; Tameze, Shella L.; Dougherty, William G.; Kassel, W. Scott; Wheeler, Kraig A.; Crystal Growth & Design 8 (2008) 3863–; doi:10.1021/cg800449r

data_4503782
_publ_section_title
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 Structural Studies of Enantiomers, Racemates, and Quasiracemates.
 2-(3-Bromophenoxy)propionic Acid and 2-(3-Methoxyphenoxy)propionic Acid
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_journal_issue                   10
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              3863
_journal_paper_doi               10.1021/cg800449r
_journal_volume                  8
_journal_year                    2008
_chemical_formula_moiety         'C10 H12 O4'
_chemical_formula_sum            'C10 H12 O4'
_chemical_formula_weight         196.20
_chemical_name_systematic
; 
  (+-)-2-(3-methoxyphenoxy)propanoic acid 
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   13.9238(13)
_cell_length_b                   8.0603(5)
_cell_length_c                   17.796(1)
_cell_measurement_reflns_used    69
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.113
_cell_measurement_theta_min      21.667
_cell_volume                     1997.2(3)
_computing_cell_refinement       XSCANS
_computing_data_collection       'XSCANS (Bruker, 1999)'
_computing_data_reduction        'XPREP (Bruker, 2001)'
_computing_molecular_graphics    'X-SEED (Barbour, 2001)'
_computing_publication_material  X-SEED
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\q/2\q\ scans'
_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  0.0216
_diffrn_reflns_av_sigmaI/netI    0.0470
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       1
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       1
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            2415
_diffrn_reflns_theta_full        25.34
_diffrn_reflns_theta_max         25.34
_diffrn_reflns_theta_min         2.29
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.101
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.305
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'transparent plate'
_exptl_crystal_F_000             832
_exptl_crystal_size_max          0.64
_exptl_crystal_size_mid          0.43
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.138
_refine_diff_density_min         -0.150
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.021
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         1823
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.021
_refine_ls_R_factor_all          0.0943
_refine_ls_R_factor_gt           0.0474
_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^)+(0.0465P)^2^+0.2481P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0933
_refine_ls_wR_factor_ref         0.1103
_reflns_number_gt                1105
_reflns_number_total             1823
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg800449r_si_001.cif
_cod_data_source_block           c:(rac)-4-II
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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 
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_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               4503782