Aluminium-catalysed isocyanate trimerization, enhanced by exploiting a dynamic coordination sphere
Bahili, Mohammed A.; Stokes, Emily C.; Amesbury, Robert C.; Ould, Darren M. C.; Christo, Bashar; Horne, Rhian J.; Kariuki, Benson M.; Stewart, Jack A.; Taylor, Rebekah L.; Williams, P. Andrew; Jones, Matthew D.; Harris, Kenneth D. M.; Ward, Benjamin D.; Chemical Communications  (2019) –; doi:10.1039/C9CC03339D

data_7123669
_publ_section_title
;
 Aluminium-catalysed isocyanate trimerization, enhanced by exploiting a
 dynamic coordination sphere
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C9CC03339D
_journal_year                    2019
_chemical_formula_sum            'C16 H14 N2 O4'
_chemical_formula_weight         298.29
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2019-02-08 deposited with the CCDC.    2019-05-14 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 99.750(7)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   15.9239(11)
_cell_length_b                   5.4001(3)
_cell_length_c                   8.0430(6)
_cell_measurement_reflns_used    1939
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.6240
_cell_measurement_theta_min      3.9850
_cell_volume                     681.63(8)
_computing_cell_refinement       'CrysAlisPro 1.171.39.45b (Rigaku OD, 2018)'
_computing_data_collection       'CrysAlisPro 1.171.39.45b (Rigaku OD, 2018)'
_computing_data_reduction        'CrysAlisPro 1.171.39.45b (Rigaku OD, 2018)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT (Sheldrick, 2014)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean 10.5082
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.875
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at home/near, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0307
_diffrn_reflns_av_unetI/netI     0.0328
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.875
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            5462
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.875
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.555
_diffrn_reflns_theta_min         3.895
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.605
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.45b (Rigaku Oxford Diffraction, 2018)
Numerical absorption correction based on gaussian integration over
            a multifaceted crystal model
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.453
_exptl_crystal_description       irregular
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.366
_exptl_crystal_size_mid          0.289
_exptl_crystal_size_min          0.186
_refine_diff_density_max         0.243
_refine_diff_density_min         -0.187
_refine_diff_density_rms         0.045
_refine_ls_extinction_coef       0.058(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     102
_refine_ls_number_reflns         1680
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0614
_refine_ls_R_factor_gt           0.0449
_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^)+(0.0737P)^2^+0.1739P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1232
_refine_ls_wR_factor_ref         0.1427
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1307
_reflns_number_total             1680
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cc03339d2.cif
_cod_data_source_block           4MeOC6H4NCO_dimer_monoclinic
_cod_database_code               7123669
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.962
_shelx_estimated_absorpt_t_max   0.981
_shelx_res_checksum              87219