Crystal structures of three anhydrous salts of the Lewis base 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) with the ring-substituted benzoic acid analogues 4-aminobenzoic acid, 3,5-dinitrobenzoic acid and 3,5-dinitrosalicylic acid
Smith, Graham; Lynch, Daniel E.; Acta Crystallographica Section E 72 (2016) 382–386; doi:10.1107/S205698901600267X

data_2241573
_publ_section_title
;
 Crystal structures of three anhydrous salts of the Lewis base
 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) with the ring-substituted
 benzoic acid analogues 4-aminobenzoic acid, 3,5-dinitrobenzoic acid and
 3,5-dinitrosalicylic acid
;
_journal_coeditor_code           PK2574
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              382
_journal_page_last               386
_journal_paper_doi               10.1107/S205698901600267X
_journal_volume                  72
_journal_year                    2016
_chemical_formula_iupac          'C9 H17 N2 +, C7 H3 N2 O7 -'
_chemical_formula_moiety         'C9 H17 N2 +, C7 H3 N2 O7 -'
_chemical_formula_sum            'C16 H20 N4 O7'
_chemical_formula_weight         380.36
_chemical_name_systematic
;
1-Aza-8-azoniabicyclo[5.4.0]undec-7-ene 2-hydroxy-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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 98.343(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.1537(3)
_cell_length_b                   19.1541(14)
_cell_length_c                   14.5527(11)
_cell_measurement_reflns_used    1891
_cell_measurement_temperature    200.0(10)
_cell_measurement_theta_max      26.56
_cell_measurement_theta_min      3.47
_cell_volume                     1697.2(2)
_computing_cell_refinement
;
CrysAlis PRO (Agilent, 2014)
;
_computing_data_collection
;
CrysAlis PRO (Agilent, 2014)
;
_computing_data_reduction
;
CrysAlis PRO (Agilent, 2014)
;
_computing_molecular_graphics
;
PLATON (Spek, 2009)
;
_computing_publication_material
;
PLATON (Spek, 2009)
;
_computing_structure_refinement
;
SHELXL97 (Sheldrick, 2008) within WinGX (Farrugia, 2012)
;
_computing_structure_solution
;
SIR92 (Altomare <i>et al.</i>, 1993)
;
_diffrn_ambient_temperature      200.0(10)
_diffrn_detector_area_resol_mean 16.077
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Oxford Diffraction Gemini-S CCD-detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0342
_diffrn_reflns_av_sigmaI/netI    0.0519
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            7800
_diffrn_reflns_theta_full        26.0
_diffrn_reflns_theta_max         26.0
_diffrn_reflns_theta_min         3.44
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.118
_exptl_absorpt_correction_T_max  0.990
_exptl_absorpt_correction_T_min  0.920
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(CrysAlis PRO; Agilent, 2014)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.489
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.286
_refine_diff_density_min         -0.291
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     263
_refine_ls_number_reflns         3339
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0899
_refine_ls_R_factor_gt           0.0576
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0374P)^2^+0.7569P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1086
_refine_ls_wR_factor_ref         0.1227
_reflns_number_gt                2347
_reflns_number_total             3339
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            pk2574sup1.cif
_cod_data_source_block           III
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2241573
_cod_database_fobs_code 2241573