C24H16N2O4
Holliman, Peter J.; Callear, Samantha K.; Hursthouse, Michael B.; Crystal Structure Report Archive  (2009) 667–; doi:

data_1520360
_publ_section_title
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 C24H16N2O4
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              667
_journal_year                    2009
_chemical_formula_sum            'C24 H16 N2 O4'
_chemical_formula_weight         396.39
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yac'
_symmetry_space_group_name_H-M   'P 1 2/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 101.110(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   22.6513(8)
_cell_length_b                   7.5907(5)
_cell_length_c                   22.7311(14)
_cell_measurement_reflns_used    35611
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     3835.1(4)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.952
_diffrn_measured_fraction_theta_max 0.952
_diffrn_measurement_device_type
'Bruker-Nonius Roper CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0815
_diffrn_reflns_av_sigmaI/netI    0.0845
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            26118
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.9906
_exptl_absorpt_correction_T_min  0.9666
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.373
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1648
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.425
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.126
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     643
_refine_ls_number_reflns         6422
_refine_ls_number_restraints     746
_refine_ls_restrained_S_all      1.004
_refine_ls_R_factor_all          0.1392
_refine_ls_R_factor_gt           0.0763
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0914P)^2^+5.4800P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1921
_refine_ls_wR_factor_ref         0.2287
_reflns_number_gt                3716
_reflns_number_total             6422
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            eCrystal-667.cif
_cod_data_source_block           2008src1083
_cod_depositor_comments
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Citation :
Holliman, Peter J. and Callear, Samantha K. and 
Hursthouse, Michael B. (2009) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/667)

More at:
http://ecrystals.chem.soton.ac.uk/667/
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_cod_original_sg_symbol_H-M      P2/n
_cod_database_code               1520360