Radical Germylzincation of α-Heteroatom-Substituted Alkynes.
de la Vega-Hernández, Karen; Romain, Elise; Coffinet, Anais; Bijouard, Kajetan; Gontard, Geoffrey; Chemla, Fabrice; Ferreira, Franck; Jackowski, Olivier; Perez-Luna, Alejandro; Journal of the American Chemical Society 140 (2018) 17632–17642; doi:10.1021/jacs.8b09851

data_4133398
_publ_section_title
;
 Radical Germylzincation of \a-Heteroatom-Substituted Alkynes.
;
_journal_issue                   50
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              17632
_journal_page_last               17642
_journal_paper_doi               10.1021/jacs.8b09851
_journal_volume                  140
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C52 H52 Ge2 N2 O4 Zn, 2(C H2 Cl2)'
_chemical_formula_sum            'C54 H56 Cl4 Ge2 N2 O4 Zn'
_chemical_formula_weight         1149.35
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   13.4291(6)
_cell_length_b                   17.2102(8)
_cell_length_c                   23.7226(12)
_cell_measurement_reflns_used    6671
_cell_measurement_temperature    200(1)
_cell_measurement_theta_max      66.47
_cell_measurement_theta_min      3.73
_cell_volume                     5482.7(4)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'SXGRAPH (Farrugia, 2012)'
_computing_publication_material  'WinGX (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      200(1)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_source         micro-source
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0935
_diffrn_reflns_av_unetI/netI     0.0995
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            25916
_diffrn_reflns_point_group_measured_fraction_full 0.981
_diffrn_reflns_point_group_measured_fraction_max 0.976
_diffrn_reflns_theta_full        66.500
_diffrn_reflns_theta_max         66.925
_diffrn_reflns_theta_min         3.172
_exptl_absorpt_coefficient_mu    3.946
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.535
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
; 
 SADABS : Krause, L., Herbst-Irmer, R., Sheldrick G.M. & Stalke D.,
 J. Appl. Cryst. 48 (2015) 3-10
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.392
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'plate fragment'
_exptl_crystal_F_000             2352
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.996
_refine_diff_density_min         -0.793
_refine_diff_density_rms         0.094
_refine_ls_abs_structure_details
;
 Flack x determined using 2709 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.02(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     622
_refine_ls_number_reflns         9520
_refine_ls_number_restraints     10
_refine_ls_restrained_S_all      1.045
_refine_ls_R_factor_all          0.0776
_refine_ls_R_factor_gt           0.0628
_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^)+(0.0848P)^2^+1.3550P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1609
_refine_ls_wR_factor_ref         0.1732
_reflns_Friedel_coverage         0.773
_reflns_Friedel_fraction_full    0.960
_reflns_Friedel_fraction_max     0.953
_reflns_number_gt                7772
_reflns_number_total             9520
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja8b09851_si_002.cif
_cod_data_source_block           Compound_45
_cod_database_code               4133398
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              833
_shelx_hkl_checksum              48071