Conformations of substituted benzophenones
Cox, Philip J.; Kechagias, Dimitrios; Kelly, Orla; Acta Crystallographica Section B 64 (2008) 206–216; doi:10.1107/S0108768108000232

data_2104097
_publ_section_title
;
 Conformations of substituted benzophenones
;
_journal_coeditor_code           WS5060
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              206
_journal_page_last               216
_journal_paper_doi               10.1107/S0108768108000232
_journal_volume                  64
_journal_year                    2008
_chemical_formula_moiety         'C21 H28 N2 O1'
_chemical_formula_sum            'C21 H28 N2 O'
_chemical_formula_weight         324.45
_chemical_name_common
;
4,4'-bis(diethylamino)benzophenone
;
_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'
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 104.6390(18)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.8519(6)
_cell_length_b                   8.0488(3)
_cell_length_c                   14.3060(5)
_cell_measurement_reflns_used    7747
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     1877.44(12)
_computing_cell_refinement       'DENZO and COLLECT'
_computing_data_collection
;
        DENZO (Otwinowski and Minor, 1997), COLLECT (Hooft, 1998)
;
_computing_data_reduction        'DENZO and COLLECT'
_computing_molecular_graphics
;
        PLATON (Spek,2002)
;
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al.,1999)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.99
_diffrn_measured_fraction_theta_max 0.99
_diffrn_measurement_device_type
;
        Bruker-Nonius 95mm CCD camers on \k-goniostat
;
_diffrn_measurement_method
;
        \f and \w scans to fill Ewald sphere
;
_diffrn_radiation_type           MoK\a
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_diffrn_reflns_av_R_equivalents  0.077
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
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_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            18012
_diffrn_reflns_theta_full        27.59
_diffrn_reflns_theta_max         27.59
_diffrn_reflns_theta_min         2.93
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.07
_exptl_absorpt_correction_T_max  0.9792
_exptl_absorpt_correction_T_min  0.9481
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
using multiple and symmetry-related data measurements via the program
SORTAV (Blessing, 1995, 1997)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.148
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.205
_refine_diff_density_min         -0.224
_refine_ls_extinction_coef       0.022(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.009
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     288
_refine_ls_number_reflns         4315
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.007
_refine_ls_R_factor_gt           0.0468
_refine_ls_shift/su_max          0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0604P)^2^+0.1446P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1217
_reflns_number_gt                2862
_reflns_number_total             4315
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ws5060.cif
_cod_data_source_block           orla1
_cod_database_code               2104097
_cod_database_fobs_code          2104097