Density and Stability Differences Between Enantiopure and Racemic Salts: Construction and Structural Analysis of a Systematic Series of Crystalline Salt Forms of Methylephedrine
Kennedy, Alan R.; Morrison, Catriona A.; Briggs, Naomi E. B.; Arbuckle, William; Crystal Growth & Design 11 (2011) 1821–; doi:10.1021/cg200030s

data_4500633
_publ_section_title
;
 Density and Stability Differences Between Enantiopure and Racemic Salts:
 Construction and Structural Analysis of a Systematic Series of
 Crystalline Salt Forms of Methylephedrine
;
_journal_issue                   5
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1821
_journal_paper_doi               10.1021/cg200030s
_journal_volume                  11
_journal_year                    2011
_chemical_formula_sum            'C11 H18 Br N O'
_chemical_formula_weight         260.17
_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                 106.920(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.73759(16)
_cell_length_b                   30.5983(11)
_cell_length_c                   6.9823(2)
_cell_measurement_reflns_used    6921
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      28.9495
_cell_measurement_theta_min      2.6532
_cell_volume                     1172.75(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Oxford Diffraction Gemini S'
_diffrn_measurement_method       'omega 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  0.0344
_diffrn_reflns_av_sigmaI/netI    0.0273
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       38
_diffrn_reflns_limit_k_min       -38
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            10504
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.00
_diffrn_reflns_theta_min         2.66
_exptl_absorpt_coefficient_mu    3.476
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.50825
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.29 (release 10-06-2008 CrysAlis171 .NET)
(compiled Jun 10 2008,16:49:55)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.474
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             536
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.822
_refine_diff_density_min         -0.758
_refine_diff_density_rms         0.096
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.396
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     138
_refine_ls_number_reflns         2529
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.396
_refine_ls_R_factor_all          0.0563
_refine_ls_R_factor_gt           0.0484
_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^)+(0.0000P)^2^+3.6270P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0864
_refine_ls_wR_factor_ref         0.0876
_reflns_number_gt                2201
_reflns_number_total             2529
_reflns_threshold_expression     I>2/s(I)
_cod_data_source_file            cg200030s_si_001.cif
_cod_data_source_block           rmepdbrtry2
_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_cell_volume        1172.75(6)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4500633