Preparation of Seven- and Eight-Membered Boron Heterocycles from Different Salen Ligands and Arylboronic Acids
Mario Sánchez; Herbert Höpfl; Maria-Eugenia Ochoa; Norberto Farfán; Rosa Santillan; Susana Rojas-Lima; Inorganic Chemistry 40 (2001) 6405–6412; doi:10.1021/ic010580g

data_4320657
_publ_contact_author_address
;
Centro de Investigaciones Qu\'imicas
Universidad Aut\'onoma del Estado de Morelos
Av. Universidad 1001
C.P. 62210 Cuernavaca
Mexico 
;
_publ_contact_author_email       ' hhopfl@buzon.uaem.mx '
_publ_contact_author_fax         ' +52 73 29 79 98 '
_publ_contact_author_name        'Herbert H\"opfl'
_publ_contact_author_phone       ' +52 73 29 79 97 '
_publ_section_title
;
 Preparation of Seven- and Eight-Membered Boron Heterocycles from
 Different Salen Ligands and Arylboronic Acids
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6405
_journal_page_last               6412
_journal_paper_doi               10.1021/ic010580g
_journal_volume                  40
_journal_year                    2001
_chemical_formula_moiety         C28H20B2F4N2O3
_chemical_formula_sum            'C28 H20 B2 F4 N2 O3'
_chemical_formula_weight         530.08
_chemical_melting_point_gt       300
_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_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.9360(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.7350(4)
_cell_length_b                   21.4186(9)
_cell_length_c                   12.1635(5)
_cell_measurement_temperature    293(2)
_cell_volume                     2490.15(18)
_computing_cell_refinement       'Bruker Smart version 5.057c, 1997-1998'
_computing_data_collection       'Smart, version 5.057c, 1997-1998'
_computing_data_reduction        'SAINT, version 6.01, 1999'
_computing_molecular_graphics
'Cameron, Chemical Crystallography Laboratory Oxford, Oxford, 2000'
_computing_publication_material  'SHELXTL-NT, version 5.10, 1999'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker SMART 6000'
_diffrn_measurement_method       CCD
_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  0.0396
_diffrn_reflns_av_sigmaI/netI    0.0451
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            16431
_diffrn_reflns_theta_full        26.01
_diffrn_reflns_theta_max         26.01
_diffrn_reflns_theta_min         1.90
_exptl_absorpt_coefficient_mu    0.111
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.414
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cube
_exptl_crystal_F_000             1088
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.29
_refine_diff_density_max         0.138
_refine_diff_density_min         -0.177
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.848
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     352
_refine_ls_number_reflns         4888
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.848
_refine_ls_R_factor_all          0.0790
_refine_ls_R_factor_gt           0.0397
_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^)+(0.0511P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0860
_refine_ls_wR_factor_ref         0.0979
_reflns_number_gt                2722
_reflns_number_total             4888
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic010580g_4.cif
_cod_data_source_block           srlh21
_cod_database_code               4320657