Reversal of regioselectivity (straight vs. cross ring closure) in the intramolecular [2+2] photocycloaddition of phenanthrene derivatives.
Kohmoto, Shigeo; Hisamatsu, Shugo; Mitsuhashi, Hakuei; Takahashi, Masahiro; Masu, Hyuma; Azumaya, Isao; Yamaguchi, Kentaro; Kishikawa, Keiki; Organic & biomolecular chemistry 8 (2010) 2174–2179; doi:10.1039/c000179a

data_7153329
_publ_section_title
;
 Reversal of regioselectivity (straight vs. cross ring closure) in the
 intramolecular [2+2] photocycloaddition of phenanthrene derivatives.
;
_journal_issue                   9
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              2174
_journal_page_last               2179
_journal_paper_doi               10.1039/c000179a
_journal_volume                  8
_journal_year                    2010
_chemical_formula_sum            'C33 H25 N O2'
_chemical_formula_weight         467.54
_space_group_IT_number           33
_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                   9.4894(18)
_cell_length_b                   27.726(5)
_cell_length_c                   9.0631(17)
_cell_measurement_reflns_used    3032
_cell_measurement_temperature    200
_cell_measurement_theta_max      26.76
_cell_measurement_theta_min      2.36
_cell_volume                     2384.5(8)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'XSHEL (Bruker AXS,2002)'
_computing_publication_material  'XCIF (Bruker AXS, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      200
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.938
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0336
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_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       34
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            11320
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.24
_diffrn_reflns_theta_min         2.27
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9841
_exptl_absorpt_correction_T_min  0.9685
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
SADABS Sheldrick 1996
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.302
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             984
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.108
_refine_diff_density_min         -0.148
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.9(12)
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     326
_refine_ls_number_reflns         4220
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.014
_refine_ls_R_factor_all          0.0487
_refine_ls_R_factor_gt           0.0371
_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^)+(0.0391P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0807
_refine_ls_wR_factor_ref         0.0860
_reflns_number_gt                3424
_reflns_number_total             4220
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c000179a.txt
_cod_data_source_block           1a(a0902042mas)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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 
;
_cod_original_sg_symbol_H-M      'Pna2(1) '
_cod_database_code               7153329