A one-component phosphonium borane Lewis pair serves as a dual initiator and catalyst in the ring-opening alternating copolymerization of anhydrides and epoxides
Hui, Jiwen; Wang, Xiaowu; Yao, Xiaoqian; Li, Zhibo; Polymer Chemistry 13 (2022) 6551–6563; doi:10.1039/D2PY01001A

data_1567964
_publ_section_title
;
 A one-component phosphonium borane Lewis pair serves as a dual initiator
 and catalyst in the ring-opening alternating copolymerization of
 anhydrides and epoxides
;
_journal_issue                   47
_journal_name_full               'Polymer Chemistry'
_journal_page_first              6551
_journal_page_last               6563
_journal_paper_doi               10.1039/D2PY01001A
_journal_volume                  13
_journal_year                    2022
_chemical_formula_sum            'C21 H20 Br P'
_chemical_formula_weight         383.25
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2021-07-21 deposited with the CCDC.	2022-11-04 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 105.376(4)
_cell_angle_gamma                90.00
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_cell_length_b                   9.9356(9)
_cell_length_c                   17.4186(18)
_cell_measurement_reflns_used    2007
_cell_measurement_temperature    298(2)
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_cell_measurement_theta_min      2.342
_cell_volume                     1813.3(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
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_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -10
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_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -18
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_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         1.94
_exptl_absorpt_coefficient_mu    2.352
_exptl_absorpt_correction_T_max  0.8341
_exptl_absorpt_correction_T_min  0.5908
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.305
_exptl_crystal_density_meas      1.404
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             784
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.677
_refine_diff_density_min         -1.583
_refine_diff_density_rms         0.118
_refine_ls_extinction_coef       0.0040(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.076
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3195
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.1057
_refine_ls_R_factor_gt           0.0695
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0732P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1626
_refine_ls_wR_factor_ref         0.1754
_reflns_number_gt                1898
_reflns_number_total             3195
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d2py01001a2.cif
_cod_data_source_block           210717f
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

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

 Adding full bibliography for 1567964--1567965.cif.
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1567964