Rhodium N-Heterocyclic Carbene-Catalyzed [4 + 2] and [5 + 2] Cycloaddition Reactions
Sang Ick Lee; Se Yeoun Park; Ji Hoon Park; Il Gu Jung; Soo Young Choi; Young Keun Chung; Bun Yeoul Lee; Journal of Organic Chemistry 71 (2006) 91–96; doi:10.1021/jo051685u

data_4021348
_publ_section_title
;
 Rhodium N-Heterocyclic Carbene-Catalyzed [4 + 2] and
 [5 + 2] Cycloaddition Reactions
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              91
_journal_page_last               96
_journal_paper_doi               10.1021/jo051685u
_journal_volume                  71
_journal_year                    2006
_chemical_formula_sum            'C14 H14 O'
_chemical_formula_weight         198.26
_chemical_name_systematic
;
 6-Phenyl-1,3,3a,6-tetrahydro-isobenzofuran
;
_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                 92.618(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   5.5387(3)
_cell_length_b                   8.7402(6)
_cell_length_c                   22.2973(13)
_cell_measurement_temperature    293(2)
_cell_volume                     1078.27(11)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    ORTEP32
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.962
_diffrn_measured_fraction_theta_max 0.962
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       '95mm CCD camera on \k-goniostat'
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0345
_diffrn_reflns_av_sigmaI/netI    0.0653
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            3675
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         1.83
_exptl_absorpt_coefficient_mu    0.019
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    0.305
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cubic
_exptl_crystal_F_000             106
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.241
_refine_diff_density_min         -0.232
_refine_diff_density_rms         0.063
_refine_ls_extinction_coef       0.121(10)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         2388
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.1167
_refine_ls_R_factor_gt           0.0557
_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^)+(0.0547P)^2^+0.2197P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1127
_refine_ls_wR_factor_ref         0.1460
_reflns_number_gt                1357
_reflns_number_total             2388
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo051685usi20050810_012148.cif
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_original_formula_sum        'C14 H14 O1'
_cod_database_code               4021348