Synthesis of closo- and nido-biscarboranes with rigid unsaturated linkers as precursors to linear metallacarborane-based molecular rods.
Safronov, Alexander V.; Sevryugina, Yulia V.; Pichaandi, Kothanda Rama; Jalisatgi, Satish S.; Hawthorne, M. Frederick; Dalton transactions (Cambridge, England : 2003) 43 (2014) 4969–4977; doi:10.1039/c3dt52596a

data_7029331
_publ_section_title
;
 Synthesis of closo- and nido-biscarboranes with rigid unsaturated linkers
 as precursors to linear metallacarborane-based molecular rods.
;
_journal_issue                   13
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              4969
_journal_page_last               4977
_journal_paper_doi               10.1039/c3dt52596a
_journal_volume                  43
_journal_year                    2014
_chemical_formula_moiety
;
 [B10 C2 H11]2 C2
;
_chemical_formula_sum            'C6 H22 B20'
_chemical_formula_weight         310.44
_chemical_melting_point          ?
_chemical_name_systematic
; 
 1,2-bis(1,2-dicarba-closo-dodecaborane(11)-8-yl)ethyne  
;
_space_group_IT_number           34
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2 -2n'
_symmetry_space_group_name_H-M   'P n n 2'
_atom_sites_solution_hydrogens   difmap
_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            2
_cell_length_a                   11.4869(10)
_cell_length_b                   11.6934(11)
_cell_length_c                   6.8962(6)
_cell_measurement_reflns_used    4038
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.11
_cell_measurement_theta_min      2.49
_cell_volume                     926.30(14)
_computing_cell_refinement       'SMART, SAINT'
_computing_data_collection       SMART
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXP-01 (Sheldrick, 2001)'
_computing_publication_material  'SHELXCIF-01 (Sheldrick, 2001)'
_computing_structure_refinement  'SHELXL-01 (Sheldrick, 2001)'
_computing_structure_solution    'SHELXS-01 (Sheldrick, 2001)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART APEX CCD'
_diffrn_measurement_method       '0.3 deg wide \w exposures'
_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  0.0430
_diffrn_reflns_av_sigmaI/netI    0.0256
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            7733
_diffrn_reflns_theta_full        27.14
_diffrn_reflns_theta_max         27.14
_diffrn_reflns_theta_min         2.49
_exptl_absorpt_coefficient_mu    0.046
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.75
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 Bruker SADABS 2008/1
;
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.113
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       needle
_exptl_crystal_F_000             316
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.473
_refine_diff_density_min         -0.202
_refine_diff_density_rms         0.082
_refine_ls_abs_structure_details
;
 Compound is a weak anomalous scatterer and no conclusions 
 about the absolute structure are justified
;
_refine_ls_extinction_coef       noref
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.189
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     162
_refine_ls_number_reflns         1114
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.188
_refine_ls_R_factor_all          0.0760
_refine_ls_R_factor_gt           0.0687
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1183P)^2^+0.1514P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1714
_refine_ls_wR_factor_ref         0.1791
_reflns_number_gt                996
_reflns_number_total             1114
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt52596a.txt
_cod_data_source_block           {[B10C2H11]C}2_(3)
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_database_code               7029331