Simple chains in methyl 3,5-dinitrobenzoate, isolated molecules in isopropyl 3,5-dinitrobenzoate, and a three-dimensional framework containing double and sextuple helices in benzyl 3,5-dinitrobenzoate, all at 120 K
Vasconcelos, Thatyana R. A.; de Souza, Marcus V. N.; Wardell, Solange M. S. V.; Wardell, James L.; Low, John N.; Glidewell, Christopher; Acta Crystallographica Section C 62 (2006) o26–o29; doi:10.1107/S0108270105038631

data_2014390
_publ_section_title
;
 Simple chains in methyl 3,5-dinitrobenzoate, isolated molecules in
 isopropyl 3,5-dinitrobenzoate, and a three-dimensional framework
 containing double and sextuple helices in benzyl 3,5-dinitrobenzoate,
 all at 120 K
;
_journal_coeditor_code           SK1889
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o26
_journal_page_last               o29
_journal_paper_doi               10.1107/S0108270105038631
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C8 H6 N2 O6'
_chemical_formula_moiety         'C8 H6 N2 O6'
_chemical_formula_sum            'C8 H6 N2 O6'
_chemical_formula_weight         226.15
_chemical_name_systematic
;
Methyl 3,5-dinitrobenzoate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/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                 101.787(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.5664(4)
_cell_length_b                   18.727(2)
_cell_length_c                   10.8416(10)
_cell_measurement_reflns_used    2070
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.56
_cell_measurement_theta_min      2.90
_cell_volume                     907.57(15)
_computing_cell_refinement       'DENZO (Otwinowski & Minor, 1997) and COLLECT'
_computing_data_collection       'COLLECT (Hooft, 1999)'
_computing_data_reduction        'DENZO and COLLECT'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'OSCAIL and SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution
'OSCAIL (McArdle, 2003) and SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR91 rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0599
_diffrn_reflns_av_sigmaI/netI    0.0632
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9551
_diffrn_reflns_theta_full        27.56
_diffrn_reflns_theta_max         27.56
_diffrn_reflns_theta_min         2.90
_diffrn_standards_decay_%        nil
_exptl_absorpt_coefficient_mu    0.145
_exptl_absorpt_correction_T_max  0.997
_exptl_absorpt_correction_T_min  0.935
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.655
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       lath
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.52
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.251
_refine_diff_density_min         -0.292
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     146
_refine_ls_number_reflns         2070
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.089
_refine_ls_R_factor_all          0.1010
_refine_ls_R_factor_gt           0.0577
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0823P)^2^+0.2307P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1531
_refine_ls_wR_factor_ref         0.1744
_reflns_number_gt                1319
_reflns_number_total             2070
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1889.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2014390
_cod_database_fobs_code          2014390