X-ray diffraction and packing analysis on vintage crystals: Wilhelm Koerner's nitrobenzene derivatives from the School of Agricultural Sciences in Milano
Demartin, Francesco; Filippini, Giuseppe; Gavezzotti, Angelo; Rizzato, Silvia; Acta Crystallographica Section B 60 (2004) 609–620; doi:10.1107/S0108768104014466

data_2102624
_publ_section_title
;
 X-ray diffraction and packing analysis on vintage crystals: Wilhelm
 Koerner's nitrobenzene derivatives from the School of Agricultural
 Sciences in Milano
;
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              609
_journal_page_last               620
_journal_paper_doi               10.1107/S0108768104014466
_journal_volume                  60
_journal_year                    2004
_chemical_formula_sum            'C7 H5 N3 O6'
_chemical_formula_weight         227.14
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 121.31(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.6440(10)
_cell_length_b                   9.5500(10)
_cell_length_c                   8.7540(10)
_cell_measurement_reflns_used    837
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      22
_cell_measurement_theta_min      2
_cell_volume                     974.5(3)
_computing_molecular_graphics    'SCHAKAL (Keller, 1993)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR2000 (Burla et al., 2001)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.966
_diffrn_measurement_device       SMART
_diffrn_measurement_method       omega-scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0321
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            2636
_diffrn_reflns_theta_full        24
_diffrn_reflns_theta_max         24
_diffrn_reflns_theta_min         2
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.138
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.79
_exptl_absorpt_correction_type   sadabs
_exptl_crystal_colour            'very light yellow'
_exptl_crystal_density_diffrn    1.548
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.26
_refine_diff_density_max         0.148
_refine_diff_density_min         -0.146
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.811
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     75
_refine_ls_number_reflns         763
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.811
_refine_ls_R_factor_all          0.048
_refine_ls_R_factor_obs          0.0342
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1341P)^2^+0.2249P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1465
_refine_ls_wR_factor_obs         0.1232
_reflns_number_total             763
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            na5014.cif
_cod_data_source_block           K19
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        974.53(17)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2102624