Neutral Pyrrole Nitrogen Atom as a π- and Mixed n,π-Donor in Hydrogen Bonding.
Pozharskii, Alexander F.; Ozeryanskii, Valery A.; Filatova, Ekaterina A.; Dyablo, Olga V.; Pogosova, Olga G.; Borodkin, Gennady S.; Filarowski, Aleksander; Steglenko, Dmitriy V.; The Journal of organic chemistry 84 (2019) 726–737; doi:10.1021/acs.joc.8b02562

data_4035960
_publ_section_title
;
 Neutral Pyrrole Nitrogen Atom as a \p- and Mixed n,\p-Donor in Hydrogen
 Bonding.
;
_journal_issue                   2
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              726
_journal_page_last               737
_journal_paper_doi               10.1021/acs.joc.8b02562
_journal_volume                  84
_journal_year                    2019
_chemical_formula_moiety         'C22 H22 N3 O2 +, B F4 -'
_chemical_formula_sum            'C22 H22 B F4 N3 O2'
_chemical_formula_weight         447.23
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     difmap
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/6
_cell_angle_alpha                99.791(4)
_cell_angle_beta                 97.172(4)
_cell_angle_gamma                107.373(4)
_cell_formula_units_Z            2
_cell_length_a                   7.8332(15)
_cell_length_b                   11.886(2)
_cell_length_c                   11.962(2)
_cell_measurement_reflns_used    1182
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      20.38
_cell_measurement_theta_min      2.77
_cell_volume                     1029.0(3)
_computing_cell_refinement       'SAINT (Bruker, 2009)'
_computing_data_collection       'APEX (Bruker, 2009)'
_computing_data_reduction        'SAINT (Bruker, 2009)'
_computing_molecular_graphics    'SHELXL-2014/6 (Sheldrick, 2014)'
_computing_publication_material
'SHELXL-2014/6 (Sheldrick, 2014) and PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXL-2014/6 (Sheldrick, 2014)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_unetI/netI     0.0924
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            7112
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.136
_diffrn_reflns_theta_min         1.840
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.443
_exptl_crystal_description       needle
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.297
_refine_diff_density_min         -0.284
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         7112
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.1487
_refine_ls_R_factor_gt           0.0757
_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^)+(0.0495P)^2^+0.8736P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1432
_refine_ls_wR_factor_ref         0.1759
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3924
_reflns_number_total             7112
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b02562_si_004.cif
_cod_data_source_block           s43
_cod_database_code               4035960
_shelxl_version_number           2014/6
_shelx_res_checksum              55642
_shelx_hkl_checksum              79141