Alkenes as alkyne equivalents in radical cascades terminated by fragmentations: overcoming stereoelectronic restrictions on ring expansions for the preparation of expanded polyaromatics.
Mohamed, Rana K.; Mondal, Sayantan; Gold, Brian; Evoniuk, Christopher J.; Banerjee, Tanmay; Hanson, Kenneth; Alabugin, Igor V.; Journal of the American Chemical Society 137 (2015) 6335–6349; doi:10.1021/jacs.5b02373

data_4123676
_publ_section_title
;
 Alkenes as alkyne equivalents in radical cascades terminated by
 fragmentations: overcoming stereoelectronic restrictions on ring
 expansions for the preparation of expanded polyaromatics.
;
_journal_issue                   19
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6335
_journal_page_last               6349
_journal_paper_doi               10.1021/jacs.5b02373
_journal_volume                  137
_journal_year                    2015
_chemical_formula_moiety         'C36 H24'
_chemical_formula_sum            'C36 H24'
_chemical_formula_weight         456.55
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3179(6)
_cell_length_b                   23.2967(17)
_cell_length_c                   14.4155(13)
_cell_measurement_reflns_used    261
_cell_measurement_temperature    173(2)
_cell_volume                     2457.6(3)
_computing_cell_refinement       'Saint V8.27(Bruker AXS, 2011)'
_computing_data_collection       'Apex2 V2012.12-0(Bruker AXS, 2012'
_computing_data_reduction        'Saint V8.27(Bruker AXS, 2011)'
_computing_molecular_graphics    'X-Seed (Barbour, 2001)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.968
_diffrn_measured_fraction_theta_max 0.968
_diffrn_measurement_device_type  'Bruker D8 Quest-photon 100 detector'
_diffrn_measurement_method       'profile data from \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  0.0309
_diffrn_reflns_av_sigmaI/netI    0.0334
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            20072
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.66
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.9965
_exptl_absorpt_correction_T_min  0.9924
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS v2012/1(Bruker, 2012)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.234
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.358
_refine_diff_density_min         -0.148
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     325
_refine_ls_number_reflns         5695
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0721
_refine_ls_R_factor_gt           0.0532
_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^)+(0.0839P)^2^+0.3660P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1372
_refine_ls_wR_factor_ref         0.1503
_reflns_number_gt                4434
_reflns_number_total             5695
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja5b02373_si_002.cif
_cod_data_source_block
;
;
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 

 Adding full bibliography for 4123676.cif.
;
_cod_database_code               4123676