Cyclobutyl-Containing Rigid Analogues of Threonine: Synthesis and Physical Chemical Properties.
Feskov, Illia O.; Chernykh, Anton V.; Kondratov, Ivan S.; Klyachina, Mariya; Daniliuc, Constantin G.; Haufe, Günter; The Journal of organic chemistry 82 (2017) 12863–12868; doi:10.1021/acs.joc.7b02259

data_4033041
_publ_section_title
;
 Cyclobutyl-Containing Rigid Analogues of Threonine: Synthesis and
 Physical Chemical Properties.
;
_journal_issue                   23
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              12863
_journal_page_last               12868
_journal_paper_doi               10.1021/acs.joc.7b02259
_journal_volume                  82
_journal_year                    2017
_chemical_formula_sum            'C12 H23 Cl N2 O6'
_chemical_formula_weight         326.77
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                63.556(1)
_cell_angle_beta                 71.826(2)
_cell_angle_gamma                68.914(1)
_cell_formula_units_Z            2
_cell_length_a                   9.5142(2)
_cell_length_b                   9.6019(3)
_cell_length_c                   10.1754(2)
_cell_measurement_reflns_used    1811
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.28
_cell_measurement_theta_min      4.08
_cell_volume                     763.67(3)
_computing_cell_refinement       'Collect (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'XP-SHELXL-2013 (Sheldrick, 2013)'
_computing_publication_material  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_computing_structure_solution    'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.952
_diffrn_measured_fraction_theta_max 0.952
_diffrn_measurement_device_type  'Nonius KappaCCD APEXII'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'Montel mirror'
_diffrn_radiation_source         'rotating anode Nonius FR591'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.029
_diffrn_reflns_av_sigmaI/netI    0.0296
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            6298
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         4.17
_exptl_absorpt_coefficient_mu    0.279
_exptl_absorpt_correction_T_max  0.9673
_exptl_absorpt_correction_T_min  0.9310
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Denzo (Otwinowski, Borek, Majewski & Minor, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.421
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             348
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.289
_refine_diff_density_min         -0.181
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         2564
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0324
_refine_ls_R_factor_gt           0.0314
_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^)+(0.0264P)^2^+0.4259P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0783
_refine_ls_wR_factor_ref         0.0792
_reflns_number_gt                2478
_reflns_number_total             2564
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo7b02259_si_001.cif
_cod_data_source_block           haf8800
_cod_depositor_comments
'Adding full bibliography for 4033040--4033042.cif.'
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4033041