A chiral phosphazane reagent strategy for the determination of enantiomeric excess of amines
Peel, Andrew J.; Terzopoulos, Alexandros; Jethwa, Rajesh B.; Choudhury, Dipanjana; Niu, Hao-Che; Bond, Andrew D.; Slaughter, Jonathan; Wright, Dominic S.; Chemical Science  (2022) –; doi:10.1039/D2SC01692C

data_1566868
_publ_section_title
;
 A chiral phosphazane reagent strategy for the determination of
 enantiomeric excess of amines
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/D2SC01692C
_journal_year                    2022
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C25 H52 N3 O P2 +, I -, 0.5(C7 H8)'
_chemical_formula_sum            'C28.5 H56 I N3 O P2'
_chemical_formula_weight         645.60
_space_group_crystal_system      monoclinic
_space_group_IT_number           5
_space_group_name_Hall           'C 2y'
_space_group_name_H-M_alt        'C 1 2 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2022-03-11 deposited with the CCDC.	2022-04-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 100.971(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.3801(5)
_cell_length_b                   11.8816(5)
_cell_length_c                   20.9273(9)
_cell_measurement_reflns_used    9984
_cell_measurement_temperature    220(2)
_cell_measurement_theta_max      66.19
_cell_measurement_theta_min      4.30
_cell_volume                     3510.3(2)
_computing_cell_refinement       'SAINT (Bruker, 2016)'
_computing_data_collection       'APEX3 (Bruker, 2016)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'Mercury (Macrae et al., 2008)'
_computing_publication_material  SHELXL
_computing_structure_refinement  'SHELXL (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      220(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker D8-QUEST PHOTON-III'
_diffrn_measurement_method       '\w and \f-scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0704
_diffrn_reflns_av_unetI/netI     0.0507
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            30591
_diffrn_reflns_point_group_measured_fraction_full 0.985
_diffrn_reflns_point_group_measured_fraction_max 0.984
_diffrn_reflns_theta_full        66.594
_diffrn_reflns_theta_max         66.594
_diffrn_reflns_theta_min         4.304
_diffrn_source                   'Incoatec I\mS Cu microsource'
_exptl_absorpt_coefficient_mu    8.191
_exptl_absorpt_correction_T_max  0.7528
_exptl_absorpt_correction_T_min  0.4502
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2014)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.222
_exptl_crystal_description       plate
_exptl_crystal_F_000             1356
_exptl_crystal_size_max          0.180
_exptl_crystal_size_mid          0.180
_exptl_crystal_size_min          0.020
_refine_diff_density_max         1.160
_refine_diff_density_min         -1.459
_refine_diff_density_rms         0.089
_refine_ls_abs_structure_details
;
Flack x determined using 2007 quotients [(I+)-(I-)]/[(I+)+(I-)]
(Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.011(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.079
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     427
_refine_ls_number_reflns         6095
_refine_ls_number_restraints     311
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0773
_refine_ls_R_factor_gt           0.0650
_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^)+(0.1045P)^2^+10.5289P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1707
_refine_ls_wR_factor_ref         0.1836
_reflns_Friedel_coverage         0.875
_reflns_Friedel_fraction_full    0.971
_reflns_Friedel_fraction_max     0.971
_reflns_number_gt                5215
_reflns_number_total             6095
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2sc01692c3.cif
_cod_data_source_block           13S
_cod_original_sg_symbol_H-M      'C 2'
_cod_original_formula_sum        'C28.50 H56 I N3 O P2'
_cod_database_code               1566868
_cambridge_user_name             'Alexandros Terzopoulos'
_cambridge_user_crsid            at844
_cambridge_supervisor_name       'Dominic Wright'
_cambridge_supervisor_crsid      dsw1000
_cambridge_crystallographer_name 'Andrew Bond'
_cambridge_crystallographer_crsid adb29
_cambridge_sample_id             AT009_crop2
_cambridge_data_id               DW_B2_0359
_shelx_estimated_absorpt_t_min   0.320
_shelx_estimated_absorpt_t_max   0.853
_shelx_res_checksum              54725
_shelx_hkl_checksum              75588