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_4024306
_publ_section_title
;
Probing Persistent Intramolecular C-H...X (X = O, S, Br, Cl, and F)
Bonding in Solution Using Benzyl Meldrum's Acid Derivatives
;
_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            'C23 H28 O6'
_chemical_formula_weight         400.45
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 110.720(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.3229(7)
_cell_length_b                   9.9293(5)
_cell_length_c                   16.8309(9)
_cell_measurement_reflns_used    4820
_cell_measurement_temperature    180(1)
_cell_measurement_theta_max      30.01
_cell_measurement_theta_min      2.42
_cell_volume                     2082.50(19)
_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 0.978
_diffrn_measured_fraction_theta_max 0.978
_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  0.0360
_diffrn_reflns_av_sigmaI/netI    0.0510
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            12701
_diffrn_reflns_theta_full        28.28
_diffrn_reflns_theta_max         28.28
_diffrn_reflns_theta_min         1.69
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.277
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'Rhombic plate'
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.17
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.234
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.039
_refine_ls_extinction_coef       0.0101(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   1.356
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     269
_refine_ls_number_reflns         5050
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.356
_refine_ls_R_factor_all          0.0771
_refine_ls_R_factor_gt           0.0489
_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^)+(0.0100P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0743
_refine_ls_wR_factor_ref         0.0774
_reflns_number_gt                3232
_reflns_number_total             5050
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo802311w_si_015.cif
_cod_data_source_block           ef1351m
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               4024306