Synthesis, Structure, and Bonding of 1-Oxa-6,6aλ(4)- chalcogenopentalenes and Related Derivatives; The Role of Intramolecular Coordination.
Prasad, Poonam Rajesh; Selvakumar, Karuthapandi; Singh, Harkesh B.; Butcher, Ray J.; The Journal of organic chemistry 81 (2016) 3214–3226; doi:10.1021/acs.joc.6b00173

data_4036642
_publ_section_title
;
 Synthesis, Structure, and Bonding of 1-Oxa-6,6a\l(4)-
 chalcogenopentalenes and Related Derivatives; The Role of Intramolecular
 Coordination.
;
_journal_issue                   8
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              3214
_journal_page_last               3226
_journal_paper_doi               10.1021/acs.joc.6b00173
_journal_volume                  81
_journal_year                    2016
_chemical_formula_moiety         'C14 H14 O2 Te'
_chemical_formula_sum            'C14 H14 O2 Te'
_chemical_formula_weight         341.85
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_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                 103.428(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.2886(4)
_cell_length_b                   14.6360(5)
_cell_length_c                   9.5487(4)
_cell_measurement_reflns_used    3794
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      75.4400
_cell_measurement_theta_min      4.7573
_cell_volume                     1262.64(9)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
;
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 10.5081
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Xcalibur, Ruby, Gemini'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0759
_diffrn_reflns_av_sigmaI/netI    0.0649
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            8138
_diffrn_reflns_theta_full        67.50
_diffrn_reflns_theta_max         75.62
_diffrn_reflns_theta_min         4.89
_exptl_absorpt_coefficient_mu    18.493
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.25351
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.34.49 (release 20-01-2011 CrysAlis171 .NET)
(compiled Jan 20 2011,15:58:25)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            red-brown
_exptl_crystal_density_diffrn    1.798
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       chunk
_exptl_crystal_F_000             664
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.826
_refine_diff_density_min         -0.902
_refine_diff_density_rms         0.158
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     154
_refine_ls_number_reflns         2564
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.0697
_refine_ls_R_factor_gt           0.0587
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0770P)^2^+1.5061P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1449
_refine_ls_wR_factor_ref         0.1574
_reflns_number_gt                2095
_reflns_number_total             2564
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo6b00173_si_007.cif
_cod_data_source_block           38
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4036642