C28H20O8
Gabbut, C.D.; Hepworth, John D.; Hibbs, Dai. E.; Hursthouse, Michael B.; Lamond, Steven J.; Crystal Structure Report Archive  (1997) 792–; doi:

data_1519186
_publ_section_title
;
 C28H20O8
;
_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              792
_journal_year                    1997
_chemical_formula_sum            'C28 H20 O8'
_chemical_formula_weight         484.44
_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                102.71(3)
_cell_angle_beta                 93.44(8)
_cell_angle_gamma                94.76(2)
_cell_formula_units_Z            4
_cell_length_a                   7.520(5)
_cell_length_b                   13.984(4)
_cell_length_c                   21.530(2)
_cell_measurement_temperature    150(2)
_cell_volume                     2193.8(16)
_computing_cell_refinement       REFINE
_computing_data_collection       'MADNES (Pflugrath & Messerschmidt, 1989)'
_computing_data_reduction        'ABSURD (Karaulov, 1992)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution
'SIR92 (Altomare, Cascarano, Giacovazzo & Guaglitardi, 1993)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.668
_diffrn_measured_fraction_theta_max 0.668
_diffrn_measurement_device_type  'Delft instruments FAST area detector'
_diffrn_measurement_method
'Intensity measurements as described by Darr, Drake, Hursthouse & Malik (1993)'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode generator'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.3666
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            5033
_diffrn_reflns_theta_full        24.78
_diffrn_reflns_theta_max         24.78
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.9850
_exptl_absorpt_correction_T_min  0.9808
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            block
_exptl_crystal_density_diffrn    1.467
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       colourless
_exptl_crystal_F_000             1008
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.181
_refine_diff_density_min         -0.168
_refine_diff_density_rms         0.045
_refine_ls_extinction_coef       0
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.523
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     655
_refine_ls_number_reflns         5033
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.523
_refine_ls_R_factor_all          0.1410
_refine_ls_R_factor_gt           0.0485
_refine_ls_shift/su_max          0.027
_refine_ls_shift/su_mean         0.005
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0723
_refine_ls_wR_factor_ref         0.1039
_reflns_number_gt                1412
_reflns_number_total             5033
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            eCrystal-792.cif
_cod_data_source_block           03hur337
_cod_depositor_comments
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Citation :
Gabbut, C.D. and Hepworth, John D. and Hibbs, Dai. E. and 
Hursthouse, Michael B. and Lamond, Steven J. (1997) 
University of Southampton, Crystal Structure Report Archive. 

More at:
http://ecrystals.chem.soton.ac.uk/792/

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 3105 2015-03-04 15:46:00Z robertas 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1519186