Cyclobutanone Mimics of Penicillins: Effects of Substitution on Conformation and Hemiketal Stability
Jarrod W. Johnson; Darryl P. Evanoff; Marc E. Savard; Gerald Lange; Timothy R. Ramadhar; Abdeljalil Assoud; Nicholas J. Taylor; Gary I. Dmitrienko; Journal of Organic Chemistry 73 (2008) 6970–6982; doi:10.1021/jo801274m

data_4023687
_publ_section_title
;
 Cyclobutanone Mimics of Penicillins: Effects of Substitution
 on Conformation and Hemiketal Stability
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              6970
_journal_page_last               6982
_journal_paper_doi               10.1021/jo801274m
_journal_volume                  73
_journal_year                    2008
_chemical_formula_sum            'C9 H9 Cl3 O3 S'
_chemical_formula_weight         303.57
_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                102.655(5)
_cell_angle_beta                 103.497(5)
_cell_angle_gamma                103.414(5)
_cell_formula_units_Z            2
_cell_length_a                   6.4915(15)
_cell_length_b                   9.542(2)
_cell_length_c                   11.396(3)
_cell_measurement_temperature    295(2)
_cell_volume                     639.2(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0367
_diffrn_reflns_av_sigmaI/netI    0.0350
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7767
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    0.868
_exptl_absorpt_correction_T_max  0.869
_exptl_absorpt_correction_T_min  0.737
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'Face-indexed analytical'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.577
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             308
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.452
_refine_diff_density_min         -0.407
_refine_diff_density_rms         0.068
_refine_ls_extinction_coef       0.090(5)
_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   1.378
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     147
_refine_ls_number_reflns         3711
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.378
_refine_ls_R_factor_all          0.0601
_refine_ls_R_factor_gt           0.0494
_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^)+(0.0160P)^2^+0.1892P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0990
_refine_ls_wR_factor_ref         0.1020
_reflns_number_gt                2898
_reflns_number_total             3711
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo801274m_si_004.cif
_cod_data_source_block           gd1313m
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'Integration' changed
to 'integration' according to
'/home/saulius/struct/CIF-dictionaries/cif_core.dic' dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_hydrogen_treatment' value 'Constr' changed to
'constr' according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_database_code               4023687