Diels-Alder reactions of 1-phosphabutadienes: a highly selective route to P[double bond, length as m-dash]C-substituted phosphacyclohexenes.
Ohtsuki, Kazuaki; Walsgrove, Henry T. G.; Hayashi, Yoshihiro; Kawauchi, Susumu; Patrick, Brian O.; Gates, Derek P.; Ito, Shigekazu; Chemical communications (Cambridge, England) 56 (2020) 774–777; doi:10.1039/c9cc08997g

data_7125801
_publ_section_title
;
 Diels-Alder reactions of 1-phosphabutadienes: a highly selective route to
 P[double bond, length as m-dash]C-substituted phosphacyclohexenes.
;
_journal_issue                   5
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              774
_journal_page_last               777
_journal_paper_doi               10.1039/c9cc08997g
_journal_volume                  56
_journal_year                    2020
_chemical_formula_moiety         'C44 H70 P2'
_chemical_formula_sum            'C44 H70 P2'
_chemical_formula_weight         660.94
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2019-07-02
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-09-16 deposited with the CCDC.	2019-12-05 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 95.5090(10)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   20.2458(6)
_cell_length_b                   10.1920(3)
_cell_length_c                   39.8543(11)
_cell_measurement_reflns_used    9930
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26.40
_cell_measurement_theta_min      2.18
_cell_volume                     8185.8(4)
_computing_cell_refinement       'SAINT V8.38A (Bruker, 2016)'
_computing_data_reduction        'SAINT V8.38A (Bruker, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'XT (Sheldrick, 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'Bruker APEX2 area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       'Bruker-Nonius Kappa diffractometer'
_diffrn_measurement_device_type  'Bruker APEX II area detector'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'mirror optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0614
_diffrn_reflns_av_unetI/netI     0.0540
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       49
_diffrn_reflns_limit_l_min       -47
_diffrn_reflns_number            80792
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.429
_diffrn_reflns_theta_min         1.027
_diffrn_source                   'microfocus sealed X-ray tube'
_diffrn_source_type              'Incoatec I\ms'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.134
_exptl_absorpt_correction_T_max  0.996
_exptl_absorpt_correction_T_min  0.940
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker, 2016/2) was used for absorption correction. wR2(int) was 0.0531 before and 0.0487 after correction. The ratio of minimum to maximum transmission is 0.9434. The \l/2 correction factor is not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.073
_exptl_crystal_description       plate
_exptl_crystal_F_000             2912
_exptl_crystal_recrystallization_method
'The material was recrystallised from a mixture of Et2O and pentane  by slow evaporation'
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.308
_refine_diff_density_min         -0.274
_refine_diff_density_rms         0.050
_refine_ls_extinction_coef       0.00013(5)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   0.998
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     870
_refine_ls_number_reflns         16787
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.998
_refine_ls_R_factor_all          0.0766
_refine_ls_R_factor_gt           0.0441
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0418P)^2^+3.3446P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0902
_refine_ls_wR_factor_ref         0.1021
_reflns_Friedel_coverage         0.000
_reflns_number_gt                11887
_reflns_number_total             16787
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9cc08997g2.cif
_cod_data_source_block           dg564
_cod_depositor_comments
'Adding full bibliography for 7125799--7125801.cif.'
_cod_database_code               7125801
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.996
_shelx_estimated_absorpt_t_min   0.975
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C5(H5), C5(H5)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C4(H4A,H4B), C3(H3A,H3B), C4(H4A,H4B)
2.c Aromatic/amide H refined with riding coordinates:
 C2(H2), C11(H11), C13(H13), C29(H29), C31(H31), C2(H2), C11(H11), C13(H13),
 C29(H29), C31(H31)
2.d Idealised Me refined as rotating group:
 C7(H7A,H7B,H7C), C8(H8A,H8B,H8C), C16(H16A,H16B,H16C), C17(H17A,H17B,H17C),
 C18(H18A,H18B,H18C), C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C22(H22A,H22B,
 H22C), C24(H24A,H24B,H24C), C25(H25A,H25B,H25C), C26(H26A,H26B,H26C), C34(H34A,
 H34B,H34C), C35(H35A,H35B,H35C), C36(H36A,H36B,H36C), C38(H38A,H38B,H38C),
 C39(H39A,H39B,H39C), C40(H40A,H40B,H40C), C42(H42A,H42B,H42C), C43(H43A,H43B,
 H43C), C44(H44A,H44B,H44C), C7(H7A,H7B,H7C), C8(H8A,H8B,H8C), C16(H16A,H16B,
 H16C), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C), C20(H20A,H20B,H20C), C21(H21A,
 H21B,H21C), C22(H22A,H22B,H22C), C24(H24A,H24B,H24C), C25(H25A,H25B,H25C),
 C26(H26A,H26B,H26C), C34(H34A,H34B,H34C), C35(H35A,H35B,H35C), C36(H36A,H36B,
 H36C), C38(H38A,H38B,H38C), C39(H39A,H39B,H39C), C40(H40A,H40B,H40C), C42(H42A,
 H42B,H42C), C43(H43A,H43B,H43C), C44(H44A,H44B,H44C)
;
_shelx_res_checksum              39124
_olex2_diffrn_ambient_temperature_device Kryoflex
_olex2_exptl_crystal_mounting_method
'The crystal was mounted on a mylar loop in oil'
_olex2_submission_original_sample_id HW166
_olex2_submission_special_instructions 'No special instructions were received'