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_7029336
_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
;
 {[B9 C2 H11] C2}2 C6 H4 {N ((C H2)3 C H3)4}2        
;
_chemical_formula_sum            'C46 H98 B18 N2'
_chemical_formula_weight         873.84
_chemical_melting_point          ?
_chemical_name_systematic
;
 tetrabutylammonium 1,4-bis(1-ethynyl-undecahydro-
 7,8-dicarba-nido-decaborate(1-))benzene   
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.556(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.9742(16)
_cell_length_b                   15.710(2)
_cell_length_c                   16.935(3)
_cell_measurement_reflns_used    6221
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.87
_cell_measurement_theta_min      2.20
_cell_volume                     2919.5(8)
_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 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0653
_diffrn_reflns_av_sigmaI/netI    0.0741
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            25157
_diffrn_reflns_theta_full        27.12
_diffrn_reflns_theta_max         27.12
_diffrn_reflns_theta_min         1.77
_exptl_absorpt_coefficient_mu    0.051
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.81
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 Bruker SADABS 2008/1
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    0.994
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    none
_exptl_crystal_description       plate
_exptl_crystal_F_000             956
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.444
_refine_diff_density_min         -0.139
_refine_diff_density_rms         0.039
_refine_ls_extinction_coef       noref
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     383
_refine_ls_number_reflns         6420
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.048
_refine_ls_R_factor_all          0.1580
_refine_ls_R_factor_gt           0.0702
_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^)+(0.0867P)^2^+0.9693P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1771
_refine_ls_wR_factor_ref         0.2187
_reflns_number_gt                3048
_reflns_number_total             6420
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c3dt52596a.txt
_cod_data_source_block           (NBu4)2{[B9C2H11]C2}2C6H4_(17)
_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.

'_symmetry_cell_setting' value
'Monoclinic' changed to 'monoclinic' according to
/usr/data/users/saulius/crontab/automatic-downloads/current/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

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_original_cell_volume        2919.7(7)
_cod_original_sg_symbol_Hall     '-P 2yn      '
_cod_original_sg_symbol_H-M      'P 1 21/n 1  '
_cod_database_code               7029336