TMSOTf-catalyzed synthesis of trisubstituted imidazoles using hexamethyldisilazane as a nitrogen source under neat and microwave irradiation conditions
Asressu, Kesatebrhan Haile; Chan, Chieh-Kai; Wang, Cheng-Chung; RSC Advances 11 (2021) 28061–28071; doi:10.1039/D1RA05802A

data_7243401
_publ_section_title
;
 TMSOTf-catalyzed synthesis of trisubstituted imidazoles using
 hexamethyldisilazane as a nitrogen source under neat and microwave
 irradiation conditions
;
_journal_issue                   45
_journal_name_full               'RSC Advances'
_journal_page_first              28061
_journal_page_last               28071
_journal_paper_doi               10.1039/D1RA05802A
_journal_volume                  11
_journal_year                    2021
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C19 H14 N2 O'
_chemical_formula_sum            'C19 H14 N2 O'
_chemical_formula_weight         286.32
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2021-05-06 deposited with the CCDC.	2021-08-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   8.9585(4)
_cell_length_b                   11.3947(5)
_cell_length_c                   28.7859(13)
_cell_measurement_reflns_used    3336
_cell_measurement_temperature    100.0(2)
_cell_measurement_theta_max      62.85
_cell_measurement_theta_min      3.07
_cell_volume                     2938.4(2)
_computing_cell_refinement       'SAINT V8.40A (Bruker Nano, Inc., 2019)'
_computing_data_collection       'Bruker Instrument Service v2012.12.0.3'
_computing_data_reduction        'SAINT V8.40A (Bruker Nano, Inc., 2019)'
_computing_molecular_graphics    'shelXle (C.B. Huebschle, rev 958)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2014)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100.0(2)
_diffrn_measured_fraction_theta_full 0.997
_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           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.1401
_diffrn_reflns_av_unetI/netI     0.1014
_diffrn_reflns_Laue_measured_fraction_full 0.997
_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       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            27891
_diffrn_reflns_point_group_measured_fraction_full 0.987
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_theta_full        66.595
_diffrn_reflns_theta_max         66.595
_diffrn_reflns_theta_min         3.070
_exptl_absorpt_coefficient_mu    0.644
_exptl_absorpt_correction_T_max  0.9621
_exptl_absorpt_correction_T_min  0.9329
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS, 1996'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.294
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       niddle
_exptl_crystal_F_000             1200
_exptl_crystal_size_max          0.320
_exptl_crystal_size_mid          0.090
_exptl_crystal_size_min          0.060
_refine_diff_density_max         0.550
_refine_diff_density_min         -0.323
_refine_diff_density_rms         0.089
_refine_ls_abs_structure_details
;
 Flack x determined using 1214 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.1(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     403
_refine_ls_number_reflns         5125
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.1249
_refine_ls_R_factor_gt           0.0871
_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^)+(0.1560P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2137
_refine_ls_wR_factor_ref         0.2411
_reflns_Friedel_coverage         0.938
_reflns_Friedel_fraction_full    0.976
_reflns_Friedel_fraction_max     0.976
_reflns_number_gt                3518
_reflns_number_total             5125
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ra05802a2.cif
_cod_data_source_block           i18117
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'none' was changed to
'?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 7556 2019-12-06 15:28:31Z antanas 

2024-11-08
Z value and formula fixed to values more according to usual
chemical conventions.                 miguel
;
_cod_original_formula_sum            'C38 H28 N4 O2'
_cod_original_formula_weight         572.64
_cod_original_formula_moiety         'C38 H28 N4 O2'
_cod_original_formula_units_Z            4
_cod_database_code               7243401
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.820
_shelx_estimated_absorpt_t_max   0.962
_shelx_res_checksum              92527