Probing Persistent Intramolecular C-H...X (X = O, S, Br, Cl, and F) Bonding in Solution Using Benzyl Meldrum's Acid Derivatives
Eric Fillion; Ashraf Wilsily; Dan Fishlock; Journal of Organic Chemistry 74 (2009) 1259–1267; doi:10.1021/jo802311w

data_4024297
_publ_section_title
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Probing Persistent Intramolecular C-H...X (X = O, S, Br, Cl, and F)
Bonding in Solution Using Benzyl Meldrum's Acid Derivatives
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_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              1259
_journal_page_last               1267
_journal_paper_doi               10.1021/jo802311w
_journal_volume                  74
_journal_year                    2009
_chemical_formula_sum            'C16 H20 O5'
_chemical_formula_weight         292.32
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            8
_cell_length_a                   8.2119(4)
_cell_length_b                   9.6137(4)
_cell_length_c                   38.6588(18)
_cell_measurement_reflns_used    7846
_cell_measurement_temperature    180(1)
_cell_measurement_theta_max      30.00
_cell_measurement_theta_min      2.70
_cell_volume                     3052.0(2)
_computing_cell_refinement       SAINT
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    SHELXTL
_diffrn_ambient_temperature      180(1)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX'
_diffrn_measurement_method       Omega
_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  0.0423
_diffrn_reflns_av_sigmaI/netI    0.0323
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       51
_diffrn_reflns_limit_l_min       -49
_diffrn_reflns_number            18787
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         2.11
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.272
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Plate fragment'
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.263
_refine_diff_density_min         -0.312
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.960
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     195
_refine_ls_number_reflns         3781
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.960
_refine_ls_R_factor_all          0.0895
_refine_ls_R_factor_gt           0.0783
_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^)+(0.0270P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1261
_refine_ls_wR_factor_ref         0.1282
_reflns_number_gt                3289
_reflns_number_total             3781
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo802311w_si_006.cif
_cod_data_source_block           ef1347m
_cod_depositor_comments
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The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'None' changed to
'none' 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 
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_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               4024297