Chiral transmission to crystal photodimerizations of leucine–methionine quasiracemic assemblies
Lu, Yuhua; Bolokowicz, Andrew. J.; Reeb, Sarah A.; Wiseman, Joshua D.; Wheeler, Kraig A.; RSC Advances 4 (2014) 8125–; doi:10.1039/c3ra47270a

data_7235313
_publ_section_title
;
 Chiral transmission to crystal photodimerizations of leucine--methionine
 quasiracemic assemblies
;
_journal_issue                   16
_journal_name_full               'RSC Advances'
_journal_page_first              8125
_journal_paper_doi               10.1039/c3ra47270a
_journal_volume                  4
_journal_year                    2014
_chemical_formula_moiety         'C14 H17 N O6 S2'
_chemical_formula_sum            'C14 H17 N O6 S2'
_chemical_formula_weight         359.41
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.372(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.2440(3)
_cell_length_b                   7.4617(3)
_cell_length_c                   27.2752(11)
_cell_measurement_reflns_used    3643
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      65.58
_cell_measurement_theta_min      3.251
_cell_volume                     1667.45(11)
_computing_cell_refinement       APEX2
_computing_data_reduction
;
SAINT (Bruker, 2009) and XPREP (Bruker, 2009)
;
_computing_molecular_graphics    'XSEED (Barbour, 2001)'
_computing_publication_material  'XSEED (Barbour, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker APEXII CCD'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0624
_diffrn_reflns_av_unetI/netI     0.0355
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -32
_diffrn_reflns_number            20611
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         67.809
_diffrn_reflns_theta_min         3.261
_exptl_absorpt_coefficient_mu    3.168
_exptl_absorpt_correction_T_max  0.7902
_exptl_absorpt_correction_T_min  0.4352
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2010)'
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.432
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'transparent plate'
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.29
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.532
_refine_diff_density_min         -0.252
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     219
_refine_ls_number_reflns         3003
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0696
_refine_ls_R_factor_gt           0.0511
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0664P)^2^+0.9405P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1289
_refine_ls_wR_factor_ref         0.1398
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2260
_reflns_number_total             3003
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c3ra47270a.cif
_cod_data_source_block           kaw115
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7235313
_shelx_estimated_absorpt_t_min   0.435
_shelx_estimated_absorpt_t_max   0.790
_shelxl_version_number           2013-4
_shelx_res_checksum              64038
_shelx_hkl_checksum              99663