Rearrangement of an Intermediate Cyclopropyl Ketene in a Rh(II)-Catalyzed Formal [4 + 1]-Cycloaddition Employing Vinyl Ketenes as 1,4-Dipoles and Donor-Acceptor Metallocarbenes.
Rodriguez, Kevin X.; Kaltwasser, Nicolai; Toni, Tiffany A.; Ashfeld, Brandon L.; Organic letters 19 (2017) 2482–2485; doi:10.1021/acs.orglett.7b00618

data_1545898
_publ_section_title
;
 Rearrangement of an Intermediate Cyclopropyl Ketene in a Rh(II)-Catalyzed
 Formal [4 + 1]-Cycloaddition Employing Vinyl Ketenes as 1,4-Dipoles and
 Donor-Acceptor Metallocarbenes.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2482
_journal_page_last               2485
_journal_paper_doi               10.1021/acs.orglett.7b00618
_journal_volume                  19
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C22 H23 N O2 Si'
_chemical_formula_sum            'C22 H23 N O2 Si'
_chemical_formula_weight         361.50
_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'
_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     dual
_atom_sites_solution_secondary   difmap
_audit_creation_date             2016-09-20
_audit_creation_method
;
Olex2 1.2
(compiled 2016.09.09 svn.r3337 for OlexSys, GUI svn.r5227)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.3782(12)
_cell_length_b                   11.6315(15)
_cell_length_c                   17.149(2)
_cell_measurement_reflns_used    9782
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      26.45
_cell_measurement_theta_min      2.38
_cell_volume                     1870.7(4)
_computing_cell_refinement       'SAINT v8.34A (Bruker, 2013)'
_computing_data_collection       'Bruker APEX-3 (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.34A (Bruker, 2013)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      120.0
_diffrn_detector_area_resol_mean 8.33
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0256
_diffrn_reflns_av_unetI/netI     0.0122
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            42546
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.544
_diffrn_reflns_theta_min         2.116
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.142
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.6981
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014/5) was used for absorption correction.
wR2(int) was 0.0412 before and 0.0381 after correction.
The Ratio of minimum to maximum transmission is 0.9365.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.284
_exptl_crystal_description       block
_exptl_crystal_F_000             768
_exptl_crystal_size_max          0.334
_exptl_crystal_size_mid          0.301
_exptl_crystal_size_min          0.222
_refine_diff_density_max         0.244
_refine_diff_density_min         -0.168
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details
;
 Flack x determined using 1603 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.01(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3892
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0295
_refine_ls_R_factor_gt           0.0285
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0398P)^2^+0.5813P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0727
_refine_ls_wR_factor_ref         0.0734
_reflns_Friedel_coverage         0.748
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.995
_reflns_number_gt                3778
_reflns_number_total             3892
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol7b00618_si_002.cif
_cod_data_source_block           kr3289
_cod_depositor_comments          'Adding full bibliography for 1545898.cif.'
_cod_original_cell_volume        1870.6(4)
_cod_database_code               1545898
_shelx_estimated_absorpt_t_max   0.969
_shelx_estimated_absorpt_t_min   0.954
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C10(H10A,H10B)
2.b Aromatic/amide H refined with riding coordinates:
 C5(H5), C6(H6), C7(H7), C8(H8), C15(H15), C16(H16), C17(H17), C18(H18),
 C19(H19)
2.c Idealised Me refined as rotating group:
 C20(H20A,H20B,H20C), C21(H21A,H21B,H21C), C22(H22A,H22B,H22C), C23(H23A,H23B,
 H23C)
;
_shelx_shelxl_version_number     2014/7
_olex2_submission_special_instructions 'No special instructions were received'