Nickel-catalyzed tetramerization of alkynes: synthesis and structure of octatetraenes.
Wu, Tsun-Cheng; Chen, Jheng-Jhih; Wu, Yao-Ting; Organic letters 13 (2011) 4794–4797; doi:10.1021/ol201814q

data_1502406
_publ_section_title
;
 Nickel-catalyzed tetramerization of alkynes: synthesis and structure of
 octatetraenes.
;
_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              4794
_journal_page_last               4797
_journal_paper_doi               10.1021/ol201814q
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C56 H42'
_chemical_formula_weight         714.90
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 106.1160(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.4203(2)
_cell_length_b                   38.0328(8)
_cell_length_c                   10.0996(2)
_cell_measurement_reflns_used    3916
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      21.3274
_cell_measurement_theta_min      2.3565
_cell_volume                     3845.31(13)
_computing_cell_refinement       'SAINT V7.34A (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2010)'
_computing_data_reduction        'SAINT V7.34A (Bruker AXS, 2006)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0428
_diffrn_reflns_av_sigmaI/netI    0.0461
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       47
_diffrn_reflns_limit_k_min       -47
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            32258
_diffrn_reflns_theta_full        26.41
_diffrn_reflns_theta_max         26.41
_diffrn_reflns_theta_min         1.07
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.9486
_exptl_absorpt_correction_T_min  0.8771
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2008/1 (Bruker AXS)'
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.235
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Tabullar
_exptl_crystal_F_000             1512
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.263
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.065
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     505
_refine_ls_number_reflns         7877
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.1038
_refine_ls_R_factor_gt           0.0588
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1112P)^2^+1.2127P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1760
_refine_ls_wR_factor_ref         0.2164
_reflns_number_gt                4923
_reflns_number_total             7877
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol201814q_si_005.cif
_cod_data_source_block           101243
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
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_cod_database_code               1502406