Supramolecular "baking powder": a hexameric halogen-bonded phosphonium salt cage encapsulates and functionalises small-molecule carbonyl compounds.
Marrett, Joseph M.; Titi, Hatem M.; Teoh, Yong; Friščić, Tomislav; Chemical science 15 (2023) 298–306; doi:10.1039/d2sc04615f

data_1570401
_publ_section_title
;
 Supramolecular "baking powder": a hexameric halogen-bonded phosphonium
 salt cage encapsulates and functionalises small-molecule carbonyl
 compounds.
;
_journal_issue                   1
_journal_name_full               'Chemical science'
_journal_page_first              298
_journal_page_last               306
_journal_paper_doi               10.1039/d2sc04615f
_journal_volume                  15
_journal_year                    2023
_chemical_formula_sum            'C22 H22 Br3 O0.75 P'
_chemical_formula_weight         569.09
_chemical_name_systematic
'(dibromomethyl)triphenylphosphonium bromide 1-isobutylaldehyde'
_space_group_crystal_system      trigonal
_space_group_IT_number           148
_space_group_name_Hall           '-R 3'
_space_group_name_H-M_alt        'R -3 :H'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2017/1
_audit_update_record
;
2021-07-07 deposited with the CCDC.	2023-11-21 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            18
_cell_length_a                   33.1440(5)
_cell_length_b                   33.1440(5)
_cell_length_c                   11.4650(2)
_cell_measurement_reflns_used    4252
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      72.437
_cell_measurement_theta_min      5.338
_cell_volume                     10907.2(3)
_computing_cell_refinement       'Bruker APEX3'
_computing_data_collection       'Bruker APEX3'
_computing_data_reduction        'Bruker APEX3'
_computing_publication_material  'enCIFer 2020.2.0'
_computing_structure_refinement  'SHELXL-2017/1 (Sheldrick, 2017)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker AXS D8'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0488
_diffrn_reflns_av_unetI/netI     0.0198
_diffrn_reflns_Laue_measured_fraction_full 0.991
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       40
_diffrn_reflns_limit_h_min       -40
_diffrn_reflns_limit_k_max       40
_diffrn_reflns_limit_k_min       -40
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            74083
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.990
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         72.437
_diffrn_reflns_theta_min         5.338
_exptl_absorpt_coefficient_mu    6.849
_exptl_absorpt_correction_T_max  0.7536
_exptl_absorpt_correction_T_min  0.4015
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker AXScale'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.560
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             5040
_exptl_crystal_size_max          0.264
_exptl_crystal_size_mid          0.114
_exptl_crystal_size_min          0.111
_refine_diff_density_max         0.712
_refine_diff_density_min         -0.856
_refine_diff_density_rms         0.060
_refine_ls_extinction_coef       0.000046(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2017/1 (Sheldrick 2017)'
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     254
_refine_ls_number_reflns         4764
_refine_ls_number_restraints     225
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0420
_refine_ls_R_factor_gt           0.0370
_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^)+(0.0335P)^2^+40.0779P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0891
_refine_ls_wR_factor_ref         0.0945
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4252
_reflns_number_total             4764
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2sc04615f2.cif
_cod_data_source_block           1_1_isobutyraldehyde
_cod_depositor_comments
'Adding full bibliography for 1570391--1570408.cif.'
_cod_original_cell_volume        10907.2(4)
_cod_database_code               1570401
_shelx_shelxl_version_number     2017/1
_shelx_estimated_absorpt_t_min   0.265
_shelx_estimated_absorpt_t_max   0.517
_shelx_res_checksum              70652
_shelx_hkl_checksum              51509
_shelx_fab_checksum              89411