Organic acid induced olefination reaction of lactones
Hikaru Yanai; Takeo Taguchi; Chem.Commun. 48 (2012) 8967–; doi:10.1039/c2cc33606e

data_7108238
_publ_section_title
;
 Organic acid induced olefination reaction of lactones
;
_journal_name_full               Chem.Commun.
_journal_page_first              8967
_journal_paper_doi               10.1039/c2cc33606e
_journal_volume                  48
_journal_year                    2012
_chemical_formula_moiety         'C12 H11 Br O3'
_chemical_formula_sum            'C12 H11 Br O3'
_chemical_formula_weight         283.12
_chemical_melting_point          123
_chemical_name_systematic
;
(Z)-Ethyl 2-(5-bromoisobenzofuran-1(3H)-ylidene)acetate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             '20 December 2011'
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 91.8430(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.2003(10)
_cell_length_b                   11.6716(9)
_cell_length_c                   7.2810(6)
_cell_measurement_reflns_used    2632
_cell_measurement_temperature    90
_cell_measurement_theta_max      27.46
_cell_measurement_theta_min      2.33
_cell_volume                     1121.19(15)
_computing_cell_refinement       'APEX2 (Bruker AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker AXS, 2006)'
_computing_data_reduction        'SAINT (Bruker AXS, 2004)'
_computing_molecular_graphics    'XSHEL (Bruker AXS,2002)'
_computing_publication_material  'XCIF (Bruker AXS, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      90
_diffrn_detector_area_resol_mean 8.333
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  'Bruker Helios multilayer confocal mirror'
_diffrn_radiation_source         'Bruker TXS fine-focus rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0210
_diffrn_reflns_av_sigmaI/netI    0.0245
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            5250
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.33
_exptl_absorpt_coefficient_mu    3.654
_exptl_absorpt_correction_T_max  0.8106
_exptl_absorpt_correction_T_min  0.5141
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
Crystal Faces plugin in Bruker APEX2 software
;
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.677
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       bllock
_exptl_crystal_F_000             568
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.368
_refine_diff_density_min         -0.299
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     147
_refine_ls_number_reflns         1974
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0258
_refine_ls_R_factor_gt           0.0217
_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^)+(0.0242P)^2^+0.5339P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0507
_refine_ls_wR_factor_ref         0.0520
_reflns_number_gt                1766
_reflns_number_total             1974
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc33606e.txt
_cod_data_source_block           4ha
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7108238