A phosphine-mediated stereocontrolled synthesis of Z-enediynes by a vicinal dialkynylation of ethynylphosphonium salts
Kyle D. Reichl; Alexander T. Radosevich; Chem.Commun. 50 (2014) 9302–; doi:10.1039/C4cc03415E

data_7115449
_publ_section_title
;
 A phosphine-mediated stereocontrolled synthesis of Z-enediynes by a
 vicinal dialkynylation of ethynylphosphonium salts
;
_journal_name_full               Chem.Commun.
_journal_page_first              9302
_journal_paper_doi               10.1039/C4cc03415E
_journal_volume                  50
_journal_year                    2014
_chemical_formula_moiety         'C34 H26 P, B F4'
_chemical_formula_sum            'C34 H26 B F4 P'
_chemical_formula_weight         552.33
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.556(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.743(6)
_cell_length_b                   10.216(5)
_cell_length_c                   26.175(16)
_cell_measurement_reflns_used    1857
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.342
_cell_measurement_theta_min      2.271
_cell_volume                     2864(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 0.986
_diffrn_measured_fraction_theta_max 0.986
_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
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0694
_diffrn_reflns_av_sigmaI/netI    0.1024
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            12224
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.00
_exptl_absorpt_coefficient_mu    0.144
_exptl_absorpt_correction_T_max  0.9900
_exptl_absorpt_correction_T_min  0.9608
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.281
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             1144
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.247
_refine_diff_density_min         -0.410
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     398
_refine_ls_number_reflns         4982
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.1801
_refine_ls_R_factor_gt           0.1084
_refine_ls_shift/su_max          0.007
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1132P)^2^+4.2075P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2633
_refine_ls_wR_factor_ref         0.2979
_reflns_number_gt                2647
_reflns_number_total             4982
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4cc03415e2.cif
_cod_data_source_block           kor6s
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7115449