Hyperconjugation Involving Strained Carbon-Carbon Bonds. Structural Analysis of Ester and Ether Derivatives and One-Bond 13C-13C Coupling Constants of α- and β-Nopinol
Shinn Dee Yeoh; Colin E. Skene; Jonathan M. White; Journal of Organic Chemistry 78 (2013) 311–319; doi:10.1021/jo3020243

data_4027841
_publ_section_title
;
 Hyperconjugation Involving Strained Carbon-Carbon Bonds. Structural
 Analysis of Ester and Ether Derivatives and One-Bond 13C-13C Coupling
 Constants of \a- and \b-Nopinol
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              311
_journal_page_last               319
_journal_paper_doi               10.1021/jo3020243
_journal_volume                  78
_journal_year                    2013
_chemical_formula_sum            'C15 H19 N O3'
_chemical_formula_weight         261.31
_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                   10.2043(6)
_cell_length_b                   11.1772(7)
_cell_length_c                   12.1590(8)
_cell_measurement_reflns_used    5068
_cell_measurement_temperature    130(2)
_cell_measurement_theta_max      27.51
_cell_measurement_theta_min      2.48
_cell_volume                     1386.80(15)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      130(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0181
_diffrn_reflns_av_sigmaI/netI    0.0209
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            8822
_diffrn_reflns_theta_full        27.51
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         2.48
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.88
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_description       block
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.289
_refine_diff_density_min         -0.278
_refine_diff_density_rms         0.039
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(10)
_refine_ls_extinction_coef       0.007(2)
_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   1.025
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     175
_refine_ls_number_reflns         3170
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.025
_refine_ls_R_factor_all          0.0391
_refine_ls_R_factor_gt           0.0378
_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^)+(0.0601P)^2^+0.2532P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0976
_refine_ls_wR_factor_ref         0.0986
_reflns_number_gt                3054
_reflns_number_total             3170
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo3020243_si_003.cif
_cod_data_source_block           jmwsdy43
_cod_database_code               4027841