Nanotube Formation Favored by Chalcogen-Chalcogen Interactions
Daniel B. Werz; Rolf Gleiter; Frank Rominger; Journal of the American Chemical Society 124 (2002) 10638–10639; doi:10.1021/ja027146d

data_4115117
_publ_contact_author_address
;
        Organisch-Chemisches Institut
        Universit\"at Heidelberg
        Im Neuenheimer Feld 270
        D-69120 Heidelberg
        Germany
;
_publ_contact_author_email       rolf.gleiter@urz.uni-heidelberg.de
_publ_contact_author_fax         '049 6221 54- 4205'
_publ_contact_author_name        'Gleiter, Rolf'
_publ_contact_author_phone       '049 6221 54- 8400'
_publ_section_title
;
 Nanotube Formation Favored by Chalcogen-Chalcogen Interactions
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10638
_journal_page_last               10639
_journal_paper_doi               10.1021/ja027146d
_journal_volume                  124
_journal_year                    2002
_chemical_formula_sum            'C6 H6 Te2'
_chemical_formula_weight         333.31
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           122
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4 2bw'
_symmetry_space_group_name_H-M   'I -4 2 d'
_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                   20.1830(4)
_cell_length_b                   20.1830(4)
_cell_length_c                   4.45900(10)
_cell_measurement_temperature    200(2)
_cell_volume                     1816.39(7)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.2445
_diffrn_reflns_av_sigmaI/netI    0.0894
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -4
_diffrn_reflns_number            6535
_diffrn_reflns_theta_full        23.33
_diffrn_reflns_theta_max         23.33
_diffrn_reflns_theta_min         2.02
_exptl_absorpt_coefficient_mu    6.339
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
'face indexed numerical absorption correction'
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    2.438
_exptl_crystal_description       needle
_exptl_crystal_F_000             1168
_exptl_crystal_size_max          .52
_exptl_crystal_size_mid          .02
_exptl_crystal_size_min          .02
_refine_diff_density_max         1.446
_refine_diff_density_min         -0.637
_refine_diff_density_rms         0.209
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.4(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.091
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     42
_refine_ls_number_reflns         659
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.091
_refine_ls_R_factor_all          0.0777
_refine_ls_R_factor_gt           0.0454
_refine_ls_shift/su_max          0.024
_refine_ls_shift/su_mean         0.006
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0453P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0976
_refine_ls_wR_factor_ref         0.1176
_reflns_number_gt                437
_reflns_number_total             659
_reflns_threshold_expression     >2sigma(I)
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_cod_data_source_block           dwe40_(in_paper_4)
_cod_database_code               4115117