Platinum-catalyzed cycloisomerization of 1,4-enynes via activation of a sp3-hybridized C–H bond
Vasu, Dhananjayan; Das, Arindam; Liu, Rai-Shung; Chemical Communications 46 (2010) 4115–4117; doi:10.1039/c0cc00071j

data_7111635
_publ_section_title
;
 Platinum-catalyzed cycloisomerization of 1,4-enynes via activation of a
 sp3-hybridized C--H bond
;
_journal_issue                   23
_journal_name_full               'Chemical Communications'
_journal_page_first              4115
_journal_page_last               4117
_journal_paper_doi               10.1039/c0cc00071j
_journal_volume                  46
_journal_year                    2010
_chemical_formula_sum            'C21 H16'
_chemical_formula_weight         268.34
_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                 101.426(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.2738(2)
_cell_length_b                   22.9796(6)
_cell_length_c                   8.8198(2)
_cell_measurement_reflns_used    3661
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      2.5
_cell_volume                     1445.00(6)
_computing_cell_refinement       'Bruker APEX2'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker Saint'
_computing_molecular_graphics    'Bruker APEX2'
_computing_publication_material  'Bruker APEX2'
_computing_structure_refinement  'Shelxtl-97 (Sheldrick, 2008)'
_computing_structure_solution    'Shelxtl-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.0208
_diffrn_reflns_av_sigmaI/netI    0.0181
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            12682
_diffrn_reflns_theta_full        26.42
_diffrn_reflns_theta_max         26.42
_diffrn_reflns_theta_min         1.77
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.7131
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.233
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Lump
_exptl_crystal_F_000             568
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.188
_refine_diff_density_min         -0.262
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     190
_refine_ls_number_reflns         2942
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.0607
_refine_ls_R_factor_gt           0.0421
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0750P)^2^+0.1759P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1202
_refine_ls_wR_factor_ref         0.1420
_reflns_number_gt                2263
_reflns_number_total             2942
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0cc00071jsup1.cif
_cod_data_source_block           090809_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 

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 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7111635