Topically resolved intramolecular CH-π interactions in phenylalanine derivatives
Jennings, W. Brian; McCarthy, Noel J. P.; Kelly, Padraig; Malone, John F.; Organic & Biomolecular Chemistry 7 (2009) 5156–5162; doi:10.1039/b916021n

data_7150789
_publ_section_title
;
 Topically resolved intramolecular CH-\p interactions in phenylalanine
 derivatives
;
_journal_issue                   24
_journal_name_full               'Organic &amp; Biomolecular Chemistry'
_journal_page_first              5156
_journal_page_last               5162
_journal_paper_doi               10.1039/b916021n
_journal_volume                  7
_journal_year                    2009
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C23 H21 N O3'
_chemical_formula_sum            'C23 H21 N O3'
_chemical_formula_weight         359.41
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   difmap
_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            4
_cell_length_a                   9.729(2)
_cell_length_b                   10.168(2)
_cell_length_c                   18.965(4)
_cell_measurement_reflns_used    979
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      24.98
_cell_measurement_theta_min      2.27
_cell_volume                     1876.1(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD area detector'
_diffrn_measurement_method       'phi and omega scan'
_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  0.0210
_diffrn_reflns_av_sigmaI/netI    0.0211
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            19868
_diffrn_reflns_theta_full        26.40
_diffrn_reflns_theta_max         26.40
_diffrn_reflns_theta_min         2.15
_exptl_absorpt_coefficient_mu    0.084
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.930
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.163
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.4(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     246
_refine_ls_number_reflns         3843
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0359
_refine_ls_R_factor_gt           0.0310
_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^)+(0.0513P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0779
_refine_ls_wR_factor_ref         0.0802
_reflns_number_gt                3457
_reflns_number_total             3843
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b916021n.txt
_cod_data_source_block           nitrone4
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7150789