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_7023179
_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 Al2 Br6 N2'
_chemical_formula_structural     (Br3Al)2(N2C4H4)
_chemical_formula_sum            'C4 H4 Al2 Br6 N2'
_chemical_formula_weight         613.45
_chemical_name_systematic        ?
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_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
_cell_angle_alpha                90
_cell_angle_beta                 117.596(5)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   6.9688(3)
_cell_length_b                   15.8935(4)
_cell_length_c                   7.5060(3)
_cell_measurement_reflns_used    2666
_cell_measurement_temperature    123(1)
_cell_measurement_theta_max      66.2138
_cell_measurement_theta_min      2.7711
_cell_volume                     736.78(6)
_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.15 (release 10-01-2008 CrysAlis171 .NET)
(compiled Jan 10 2008,16:37:18)
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.32.15 (release 10-01-2008 CrysAlis171 .NET)
(compiled Jan 10 2008,16:37:18)
;
_computing_data_reduction
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.15 (release 10-01-2008 CrysAlis171 .NET)
(compiled Jan 10 2008,16:37:18)
;
_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
_diffrn_detector_area_resol_mean 10.5431
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Oxford Diffraction Gemini Ultra'
_diffrn_measurement_method       omega-scan
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0713
_diffrn_reflns_av_sigmaI/netI    0.0419
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            5528
_diffrn_reflns_reduction_process
;
;
_diffrn_reflns_theta_full        65.06
_diffrn_reflns_theta_max         65.06
_diffrn_reflns_theta_min         5.57
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    20.616
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.01039
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.32.15 (release 10-01-2008 CrysAlis171 .NET)
(compiled Jan 10 2008,16:37:18)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.765
_exptl_crystal_density_method    'Not Measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             556
_exptl_crystal_size_max          0.320
_exptl_crystal_size_mid          0.130
_exptl_crystal_size_min          0.060
_refine_diff_density_max         0.910
_refine_diff_density_min         -1.014
_refine_diff_density_rms         0.213
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     64
_refine_ls_number_reflns         1250
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.040
_refine_ls_R_factor_all          0.0444
_refine_ls_R_factor_gt           0.0355
_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^)+(0.0558P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0841
_refine_ls_wR_factor_ref         0.0877
_reflns_number_gt                1056
_reflns_number_total             1250
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c3dt50954k.txt
_cod_data_source_block           1
_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      'P 21/c'
_cod_database_code               7023179