Hydrogen bonding in <i>C</i>-methylated nitroanilines: three triclinic examples with <i>Z</i>' = 2 or 4
Cannon, Debbie; Glidewell, Christopher; Low, John N.; Quesada, Antonio; Wardell, James L.; Acta Crystallographica Section C 57 (2001) 216–221; doi:10.1107/S0108270100017984

data_2011776
_publ_section_title
;
 Hydrogen bonding in <i>C</i>-methylated nitroanilines: three triclinic
 examples with <i>Z</i>' = 2 or 4
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              216
_journal_page_last               221
_journal_paper_doi               10.1107/S0108270100017984
_journal_volume                  57
_journal_year                    2001
_chemical_formula_moiety         'C8 H10 N2 O2'
_chemical_formula_sum            'C8 H10 N2 O2'
_chemical_formula_weight         166.18
_chemical_name_systematic
;
4,5-Dimethyl-2-nitroaniline
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_cell_angle_alpha                81.43(3)
_cell_angle_beta                 89.27(3)
_cell_angle_gamma                61.84(3)
_cell_formula_units_Z            4
_cell_length_a                   7.1422(14)
_cell_length_b                   7.4564(15)
_cell_length_c                   17.044(3)
_cell_measurement_reflns_used    3468
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.35
_cell_measurement_theta_min      3.14
_cell_volume                     789.6(4)
_computing_cell_refinement       'DENZO (Otwinowski & Minor, 1997)'
_computing_data_collection       'KappaCCD Server Software (Nonius, 1997)'
_computing_data_reduction        DENZO
_computing_molecular_graphics    'PLATON (Spek, 2000)'
_computing_publication_material  'SHELXL97  and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full .969
_diffrn_measured_fraction_theta_max .969
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       '\f scans and \w scans with \k offsets'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     .71073
_diffrn_reflns_av_R_equivalents  .060
_diffrn_reflns_av_sigmaI/netI    .101
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            9952
_diffrn_reflns_theta_full        27.35
_diffrn_reflns_theta_max         27.35
_diffrn_reflns_theta_min         3.14
_diffrn_standards_decay_%        negligible
_exptl_absorpt_coefficient_mu    .103
_exptl_absorpt_correction_T_max  .997
_exptl_absorpt_correction_T_min  .986
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SORTAV; Blessing, 1995, 1997)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.398
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             352
_exptl_crystal_size_max          .14
_exptl_crystal_size_mid          .12
_exptl_crystal_size_min          .03
_refine_diff_density_max         .28
_refine_diff_density_min         -.37
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   .958
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     221
_refine_ls_number_reflns         3468
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      .958
_refine_ls_R_factor_all          .115
_refine_ls_R_factor_gt           .057
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         .000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0797P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         .159
_reflns_number_gt                1988
_reflns_number_total             3468
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1437.cif
_cod_data_source_block           II
_cod_original_cell_volume        789.6(3)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               2011776
_cod_database_fobs_code          2011776