Structural and thermodynamic properties of molecular complexes of aluminum and gallium trihalides with bifunctional donor pyrazine: decisive role of Lewis acidity in 1D polymer formation.
Sevastianova, Tatiana N.; Bodensteiner, Michael; Lisovenko, Anna S.; Davydova, Elena I.; Scheer, Manfred; Susliakova, Tatiana V.; Krasnova, Irina S.; Timoshkin, Alexey Y.; Dalton transactions (Cambridge, England : 2003) 42 (2013) 11589–11599; doi:10.1039/c3dt50954k

data_7023180
_publ_section_title
;
 Structural and thermodynamic properties of molecular complexes of
 aluminum and gallium trihalides with bifunctional donor pyrazine:
 decisive role of Lewis acidity in 1D polymer formation.
;
_journal_issue                   32
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              11589
_journal_page_last               11599
_journal_paper_doi               10.1039/c3dt50954k
_journal_volume                  42
_journal_year                    2013
_chemical_compound_source        'see text'
_chemical_formula_moiety         'C4 H4 Al Br3 N2'
_chemical_formula_sum            'C4 H4 Al Br3 N2'
_chemical_formula_weight         346.77
_chemical_name_systematic        ?
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90
_cell_angle_beta                 104.753(14)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.2325(11)
_cell_length_b                   6.7023(4)
_cell_length_c                   11.8372(19)
_cell_measurement_reflns_used    2419
_cell_measurement_temperature    123(1)
_cell_measurement_theta_max      32.5680
_cell_measurement_theta_min      3.0316
_cell_volume                     861.77(18)
_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.5 (release 08-05-2007 CrysAlis171 .NET)
(compiled May 8 2007,13:10:02)
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.32.5 (release 08-05-2007 CrysAlis171 .NET)
(compiled May 8 2007,13:10:02)
;
_computing_data_reduction
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.5 (release 08-05-2007 CrysAlis171 .NET)
(compiled May 8 2007,13:10:02)
;
_computing_molecular_graphics    'PLATON (Spek, 1990)'
_computing_publication_material  'PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR-97 (Altomare, 1999)'
_diffrn_ambient_temperature      123(1)
_diffrn_detector_area_resol_mean 10.5431
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Oxford Diffraction Gemini Ultra'
_diffrn_measurement_method       omega-scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0426
_diffrn_reflns_av_sigmaI/netI    0.0356
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            4473
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        30.51
_diffrn_reflns_theta_max         30.51
_diffrn_reflns_theta_min         3.56
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    14.072
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.11272
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.5 (release 08-05-2007 CrysAlis171 .NET)
(compiled May 8 2007,13:10:02)
Analytical absorption correction using crystal faces,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.673
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.600
_exptl_crystal_size_mid          0.250
_exptl_crystal_size_min          0.180
_refine_diff_density_max         1.265
_refine_diff_density_min         -0.769
_refine_diff_density_rms         0.190
_refine_ls_extinction_coef       0.0029(3)
_refine_ls_extinction_expression FC^*^=KFC[1+0.001XFC^2^\L^3^/SIN(2\Q)]^-1/4^
_refine_ls_extinction_method     shelxl
_refine_ls_goodness_of_fit_ref   0.986
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     48
_refine_ls_number_reflns         1316
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.986
_refine_ls_R_factor_all          0.0461
_refine_ls_R_factor_gt           0.0322
_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^)+(0.0495P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0762
_refine_ls_wR_factor_ref         0.0795
_reflns_number_gt                1027
_reflns_number_total             1316
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c3dt50954k.txt
_cod_data_source_block           ta01
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7023180