On pyridine chloronium cations
Pröhm, Patrick; Berg, Willi; Rupf, Susanne Margot; Müller, Carsten; Riedel, Sebastian; Chemical Science 14 (2023) 2325–2329; doi:10.1039/D2SC06757A

data_1568409
_publ_section_title
;
 On pyridine chloronium cations
;
_journal_issue                   9
_journal_name_full               'Chemical Science'
_journal_page_first              2325
_journal_page_last               2329
_journal_paper_doi               10.1039/D2SC06757A
_journal_volume                  14
_journal_year                    2023
_chemical_formula_moiety         '0.5(C14 H18 Cl2 N2), Cl3, 0.5(C14 H18 N2)'
_chemical_formula_sum            'C14 H18 Cl4 N2'
_chemical_formula_weight         356.10
_space_group_crystal_system      monoclinic
_space_group_IT_number           11
_space_group_name_Hall           '-P 2yb'
_space_group_name_H-M_alt        'P 1 21/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2022-02-03
_audit_creation_method
;
Olex2 1.3
(compiled Nov 21 2019 18:26:39 for OlexSys, GUI svn.r6003)
;
_audit_update_record
;
2022-11-30 deposited with the CCDC.	2023-02-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 104.077(5)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   8.3507(10)
_cell_length_b                   6.7026(6)
_cell_length_c                   15.1667(17)
_cell_measurement_reflns_used    4471
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      28.28
_cell_measurement_theta_min      2.56
_cell_volume                     823.41(15)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      100.0
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.988
_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_R_equivalents  0.0280
_diffrn_reflns_av_unetI/netI     0.0274
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            7667
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.988
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.354
_diffrn_reflns_theta_min         2.559
_diffrn_source_current           1.0
_diffrn_source_power             0.05
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.710
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6612
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.0628 before and 0.0443 after correction.
The Ratio of minimum to maximum transmission is 0.8867.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.436
_exptl_crystal_description       plate
_exptl_crystal_F_000             368
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.412
_refine_diff_density_min         -0.245
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     125
_refine_ls_number_reflns         2197
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0287
_refine_ls_R_factor_gt           0.0250
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0312P)^2^+0.2456P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0662
_refine_ls_wR_factor_ref         0.0680
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1997
_reflns_number_total             2197
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2sc06757a2.cif
_cod_data_source_block           p21_m_final
_cod_depositor_comments
'Adding full bibliography for 1568406--1568411.cif.'
_cod_database_code               1568409
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.952
_shelx_estimated_absorpt_t_min   0.789
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Others
 Fixed Sof: H15A(0.5) H15B(0.5) H15C(0.5) H16A(0.5) H16B(0.5) H16C(0.5)
 H25A(0.5) H25B(0.5) H25C(0.5) H26A(0.5) H26B(0.5) H26C(0.5)
3.a Aromatic/amide H refined with riding coordinates:
 C11(H11), C12(H12), C13(H13), C21(H21), C22(H22), C23(H23)
3.b Idealised Me refined as rotating group:
 C15(H15A,H15B,H15C), C16(H16A,H16B,H16C), C25(H25A,H25B,H25C), C26(H26A,H26B,
 H26C)
;
_shelx_res_checksum              96131
_shelx_hkl_checksum              5219
_olex2_submission_special_instructions 'No special instructions were received'