Structure and Stereodynamics of N,N-Bis(silyloxy)enamines
Alexander A. Tishkov; Alexander D. Dilman; Valery I. Faustov; Arsenij A. Birukov; Konstantin S. Lysenko; Paul A. Belyakov; Sema L. Ioffe; Yury A. Strelenko; Michael Yu. Antipin; Journal of the American Chemical Society 124 (2002) 11358–11367; doi:10.1021/ja026548i

data_4115162
_publ_section_title
;
 Structure and Stereodynamics of N,N-Bis(silyloxy)enamines
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11358
_journal_page_last               11367
_journal_paper_doi               10.1021/ja026548i
_journal_volume                  124
_journal_year                    2002
_chemical_formula_moiety         'C21 H49 N O3 Si3'
_chemical_formula_sum            'C21 H49 N O3 Si3'
_chemical_formula_weight         447.88
_chemical_melting_point          301(2)
_chemical_name_systematic
; 
4-Methyl-2-N,N-bis(t-butyldimethylsilyloxy)amino-3-trimethylsilyloxy-pent-1-ene 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 102.837(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.961(3)
_cell_length_b                   10.926(3)
_cell_length_c                   22.229(6)
_cell_measurement_reflns_used    184
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      28
_cell_measurement_theta_min      4
_cell_volume                     2832.4(13)
_computing_cell_refinement       'SMART (Bruker, 1998b)'
_computing_data_collection       'SMART (Bruker, 1998b)'
_computing_data_reduction        'SAINTPlus (Bruker, 1998a)'
_computing_molecular_graphics    'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_publication_material  'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_structure_refinement  'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_structure_solution    'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_diffrn_ambient_temperature      110(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0387
_diffrn_reflns_av_sigmaI/netI    0.0438
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            19878
_diffrn_reflns_theta_full        27.56
_diffrn_reflns_theta_max         27.56
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    0.186
_exptl_absorpt_correction_T_max  0.877
_exptl_absorpt_correction_T_min  0.786
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS(Sheldrick, 1998a)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.050
_exptl_crystal_description       prism
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.780
_refine_diff_density_min         -0.260
_refine_diff_density_rms         0.075
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.984
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     450
_refine_ls_number_reflns         6510
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.984
_refine_ls_R_factor_all          0.0763
_refine_ls_R_factor_gt           0.0528
_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^)+(0.0920P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1293
_refine_ls_wR_factor_ref         0.1457
_reflns_number_gt                4501
_reflns_number_total             6510
_reflns_threshold_expression     I>2s(I)
_cod_data_source_file            ja026548i_s3.cif
_cod_data_source_block           comp1K
_cod_database_code               4115162