C22H18N4O4
Tizzard, Graham J.; Hursthouse, Michael B.; Spencer, John; Crystal Structure Report Archive  (2009) 1227–; doi:

data_1520285
_publ_section_title
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 C22H18N4O4
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              1227
_journal_year                    2009
_chemical_formula_moiety         'C22 H18 N4 O4'
_chemical_formula_sum            'C22 H18 N4 O4'
_chemical_formula_weight         402.40
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                87.410(4)
_cell_angle_beta                 75.837(3)
_cell_angle_gamma                62.831(3)
_cell_formula_units_Z            2
_cell_length_a                   8.3907(5)
_cell_length_b                   8.7207(4)
_cell_length_c                   15.3024(9)
_cell_measurement_reflns_used    21669
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     963.02(10)
_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_molecular_graphics    'CrystalMaker (CrystalMaker Software Ltd, 2009'
_computing_publication_material  'WINGX (Farrugia, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 66.065
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type
'Bruker-Nonius APEX II CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans to fill the asymmetric unit'
_diffrn_radiation_monochromator  '10cm confocal mirrors'
_diffrn_radiation_source         'Bruker Nonius FR591 Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1087
_diffrn_reflns_av_sigmaI/netI    0.0995
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            15539
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9990
_exptl_absorpt_correction_T_min  0.9864
_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    1.388
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.356
_refine_diff_density_min         -0.386
_refine_diff_density_rms         0.089
_refine_ls_extinction_coef       0.010(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   1.147
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     276
_refine_ls_number_reflns         3379
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.147
_refine_ls_R_factor_all          0.1629
_refine_ls_R_factor_gt           0.1043
_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^)+(0.0382P)^2^+4.2924P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1950
_refine_ls_wR_factor_ref         0.2259
_reflns_number_gt                2186
_reflns_number_total             3379
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            eCrystal-1227.cif
_cod_data_source_block           2009src1152
_cod_depositor_comments
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Citation :
Tizzard, Graham J. and Hursthouse, Michael B. and 
Spencer, John (2009) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/1227)

More at:
http://ecrystals.chem.soton.ac.uk/1227/
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_cod_original_cell_volume        963.02(9)
_cod_database_code               1520285