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_2102623
_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            'C8 H6 Br I N2 O3'
_chemical_formula_weight         384.96
_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                96.98(2)
_cell_angle_beta                 97.03(2)
_cell_angle_gamma                103.34(2)
_cell_formula_units_Z            2
_cell_length_a                   4.797(2)
_cell_length_b                   7.673(2)
_cell_length_c                   15.654(4)
_cell_measurement_reflns_used    3296
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2
_cell_volume                     549.7(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 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0335
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            4680
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         25
_diffrn_reflns_theta_min         2
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    6.535
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.62
_exptl_absorpt_correction_type   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.326
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       column
_exptl_crystal_F_000             360
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.587
_refine_diff_density_min         -1.478
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_obs   1.088
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     136
_refine_ls_number_reflns         1947
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_R_factor_all          0.0342
_refine_ls_R_factor_obs          0.0313
_refine_ls_shift/su_max          0.013
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0680P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0984
_refine_ls_wR_factor_gt          0.0853
_reflns_number_total             1947
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            na5014.cif
_cod_data_source_block           K15
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 'Triclinic' changed to 'triclinic'
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_database_code               2102623