Lactone Radical Cyclizations and Cyclization Cascades Mediated by SmI2-H2O
Dixit Parmar; Hiroshi Matsubara; Kieran Price; Malcolm Spain; David J. Procter; Journal of the American Chemical Society 134 (2012) 12751–12757; doi:10.1021/ja3047975

data_4118415
_publ_section_title
;
 Lactone Radical Cyclizations and Cyclization Cascades Mediated by
 SmI2-H2O
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12751
_journal_page_last               12757
_journal_paper_doi               10.1021/ja3047975
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'C15 H20 O2'
_chemical_formula_weight         232.31
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 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                   7.1360(15)
_cell_length_b                   9.2544(19)
_cell_length_c                   19.013(4)
_cell_measurement_temperature    100(2)
_cell_volume                     1255.6(5)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.1142
_diffrn_reflns_av_sigmaI/netI    0.0621
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            7009
_diffrn_reflns_theta_full        26.49
_diffrn_reflns_theta_max         26.49
_diffrn_reflns_theta_min         2.14
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9765
_exptl_absorpt_correction_T_min  0.9390
_exptl_crystal_density_diffrn    1.229
_exptl_crystal_F_000             504
_exptl_crystal_size_max          0.80
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.313
_refine_diff_density_min         -0.201
_refine_diff_density_rms         0.052
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.093
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     160
_refine_ls_number_reflns         1514
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.093
_refine_ls_R_factor_all          0.0493
_refine_ls_R_factor_gt           0.0451
_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^)+(0.0556P)^2^+0.2540P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1123
_refine_ls_wR_factor_ref         0.1144
_reflns_number_gt                1410
_reflns_number_total             1514
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja3047975_si_002.cif
_cod_data_source_block           s3585m
_cod_original_cell_volume        1255.6(4)
_cod_database_code               4118415