Structural Studies of Racemates and Quasiracemates: Chloro, Bromo, and Methyl Adducts of 2-Phenoxypropionic Acid
Lineberry, Aaron M.; Benjamin, Ellis T.; Davis, Raymond E.; Kassel, W. Scott; Wheeler, Kraig A.; Crystal Growth & Design 8 (2008) 612–; doi:10.1021/cg700789y

data_4503032
_publ_section_title
;
 Structural Studies of Racemates and Quasiracemates: Chloro, Bromo, and
 Methyl Adducts of 2-Phenoxypropionic Acid
;
_journal_issue                   2
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              612
_journal_paper_doi               10.1021/cg700789y
_journal_volume                  8
_journal_year                    2008
_chemical_formula_sum            'C9 H9 Br O3'
_chemical_formula_weight         245.07
_chemical_name_systematic
; 
 (rac)-2-(2-bromophenoxy)propionic acid
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 93.6930(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.4613(2)
_cell_length_b                   7.7470(3)
_cell_length_c                   16.3410(6)
_cell_measurement_temperature    100(2)
_cell_volume                     942.59(6)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'Bruker kappa Apex II'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0183
_diffrn_reflns_av_sigmaI/netI    0.0114
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            13565
_diffrn_reflns_theta_full        68.28
_diffrn_reflns_theta_max         68.28
_diffrn_reflns_theta_min         5.43
_exptl_absorpt_coefficient_mu    5.740
_exptl_absorpt_correction_T_max  0.5458
_exptl_absorpt_correction_T_min  0.3649
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.727
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'transparent tablet'
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.265
_refine_diff_density_min         -0.625
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.165
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     123
_refine_ls_number_reflns         1684
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.165
_refine_ls_R_factor_all          0.0214
_refine_ls_R_factor_gt           0.0213
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0261P)^2^+0.7665P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0542
_refine_ls_wR_factor_ref         0.0543
_reflns_number_gt                1674
_reflns_number_total             1684
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            2-halo.cif
_cod_data_source_block           2
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4503032