Realizing the Photoene Reaction with Alkenes under Visible Light Irradiation and Bypassing the Favored [2 + 2]-Photocycloaddition.
Ahuja, Sapna; Raghunathan, Ramya; Kumarasamy, Elango; Jockusch, Steffen; Sivaguru, Jayaraman; Journal of the American Chemical Society 140 (2018) 13185–13189; doi:10.1021/jacs.8b08100

data_4133037
_publ_section_title
;
 Realizing the Photoene Reaction with Alkenes under Visible Light
 Irradiation and Bypassing the Favored [2 + 2]-Photocycloaddition.
;
_journal_issue                   41
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13185
_journal_page_last               13189
_journal_paper_doi               10.1021/jacs.8b08100
_journal_volume                  140
_journal_year                    2018
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C21 H29 N O2'
_chemical_formula_sum            'C21 H29 N O2'
_chemical_formula_weight         327.45
_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     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2012-09-04
_audit_creation_method
;
  Olex2 1.2
  (compiled 2012.05.09 svn.r2324, GUI svn.r4230)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.6714(3)
_cell_length_b                   10.6397(4)
_cell_length_c                   22.9376(8)
_cell_measurement_reflns_used    8217
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      68.32
_cell_measurement_theta_min      3.85
_cell_volume                     1872.20(12)
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
XL, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_computing_structure_solution
;
XS, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0256
_diffrn_reflns_av_unetI/netI     0.0202
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            13357
_diffrn_reflns_theta_full        68.35
_diffrn_reflns_theta_max         68.35
_diffrn_reflns_theta_min         3.85
_diffrn_source                   'fine-focus sealed tube'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.574
_exptl_absorpt_correction_T_max  0.7530
_exptl_absorpt_correction_T_min  0.6733
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2008) was used for absorption correction.
wR2(int) was 0.0642 before and 0.0381 after correction.
The Ratio of minimum to maximum transmission is 0.8942.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.162
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.140
_refine_diff_density_min         -0.161
_refine_diff_density_rms         0.033
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.02(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     223
_refine_ls_number_reflns         3354
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0284
_refine_ls_R_factor_gt           0.0273
_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^)+(0.0343P)^2^+0.2777P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0679
_refine_ls_wR_factor_ref         0.0692
_reflns_number_gt                3243
_reflns_number_total             3354
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja8b08100_si_002.cif
_cod_data_source_block           3b_P,R,R
_cod_database_code               4133037