[3+1+1] type cyclization of ClCF<sub>2</sub>COONa for the assembly of imidazoles and tetrazoles via in situ generated isocyanides.
Wang, Ya; Zhou, Yao; Song, Qiuling; Chemical communications (Cambridge, England) 56 (2020) 6106–6109; doi:10.1039/d0cc01919d

data_7126411
_publ_section_title
;
 [3+1+1] type cyclization of ClCF<sub>2</sub>COONa for the assembly of
 imidazoles and tetrazoles via in situ generated isocyanides.
;
_journal_issue                   45
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              6106
_journal_page_last               6109
_journal_paper_doi               10.1039/d0cc01919d
_journal_volume                  56
_journal_year                    2020
_chemical_formula_moiety         'C8 H8 N4'
_chemical_formula_sum            'C8 H8 N4'
_chemical_formula_weight         160.18
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-07-02
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-07-03 deposited with the CCDC.	2020-04-20 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 96.261(9)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.7747(9)
_cell_length_b                   5.6834(5)
_cell_length_c                   14.3307(13)
_cell_measurement_reflns_used    948
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.5660
_cell_measurement_theta_min      4.5500
_cell_volume                     791.37(12)
_computing_cell_refinement       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      293.15
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 16.1213
_diffrn_detector_type            Eos
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.860
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w     33.00  83.00   1.00    5.70    --   15.65  57.00 150.00   50
  2  \w     26.00  82.00   1.00    5.70    --   15.65  77.00 -90.00   56
  3  \w    -14.00  84.00   1.00    5.70    --   15.65  19.00  90.00   98
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Xcalibur, Eos, Gemini'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      0.0364810000
_diffrn_orient_matrix_UB_12      0.0843325000
_diffrn_orient_matrix_UB_13      0.0296007000
_diffrn_orient_matrix_UB_21      -0.0521910000
_diffrn_orient_matrix_UB_22      -0.0039698000
_diffrn_orient_matrix_UB_23      0.0306732000
_diffrn_orient_matrix_UB_31      0.0356960000
_diffrn_orient_matrix_UB_32      -0.0918392000
_diffrn_orient_matrix_UB_33      0.0257843000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0168
_diffrn_reflns_av_unetI/netI     0.0253
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.860
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       7
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            3418
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.860
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.142
_diffrn_reflns_theta_min         3.860
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.089
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.73341
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.41 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.344
_exptl_crystal_description       block
_exptl_crystal_F_000             336
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.154
_refine_diff_density_min         -0.126
_refine_diff_density_rms         0.032
_refine_ls_extinction_coef       0.015(4)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     111
_refine_ls_number_reflns         1834
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0774
_refine_ls_R_factor_gt           0.0483
_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^)+(0.0713P)^2^+0.0353P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1295
_refine_ls_wR_factor_ref         0.1511
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1174
_reflns_number_total             1834
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0cc01919d2.cif
_cod_data_source_block           exp_7025
_cod_depositor_comments
'Adding full bibliography for 7126410--7126412.cif.'
_cod_database_code               7126411
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.991
_shelx_estimated_absorpt_t_min   0.989
_reflns_odcompleteness_completeness 99.16
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_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.a Aromatic/amide H refined with riding coordinates:
 C1(H1), C3(H3), C4(H4), C6(H6), C7(H7)
2.b Idealised Me refined as rotating group:
 C8(H8A,H8B,H8C)
;
_shelx_res_checksum              60479
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.361
_oxdiff_exptl_absorpt_empirical_full_min 0.671