Diiodoacetylene: compact, strong ditopic halogen bond donor
Perkins, Catherine; Libri, Stefano; Adams, Harry; Brammer, Lee; CrystEngComm 14 (2012) 3033–; doi:10.1039/c2ce00029f

data_7207730
_publ_section_title
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 Diiodoacetylene: compact, strong ditopic halogen bond donor
;
_journal_issue                   9
_journal_name_full               CrystEngComm
_journal_page_first              3033
_journal_paper_doi               10.1039/c2ce00029f
_journal_volume                  14
_journal_year                    2012
_chemical_formula_moiety         '0.5(C4 I4), C6 H12 N2'
_chemical_formula_sum            'C8 H12 I2 N2'
_chemical_formula_weight         390.00
_chemical_name_systematic
;
?
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           11
_space_group_name_Hall           '-P 2yb'
_space_group_name_H-M_alt        'P 1 21/m 1'
_symmetry_space_group_name_Hall  '-P 2yb'
_symmetry_space_group_name_H-M   'P 1 21/m 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2011-10-25
_audit_creation_method
;
Olex2 1.1-alpha
(compiled 2011.09.28 svn.r2007, GUI svn.r3868)
;
_cell_angle_alpha                90.00
_cell_angle_beta                 101.233(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   6.5418(2)
_cell_length_b                   8.2834(3)
_cell_length_c                   10.3370(3)
_cell_measurement_temperature    120
_cell_volume                     549.41(3)
_computing_cell_refinement       'Bruker APEX II'
_computing_data_collection       'Bruker APEX II'
_computing_data_reduction        'Bruker APEX II'
_computing_molecular_graphics
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_publication_material
;
O. V. Dolomanov, L. J. Bourhis, R. J. Gildea, J. A. K. Howard and H. Puschmann,
OLEX2: a complete structure solution, refinement and analysis program.
J. Appl. Cryst. (2009). 42, 339-341.
;
_computing_structure_refinement
;
XL, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_computing_structure_solution
;
XS, G.M. Sheldrick, Acta Cryst.
(2008). A64, 112-122
;
_diffrn_ambient_temperature      120
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX II CCD detector'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0236
_diffrn_reflns_av_unetI/netI     0.0237
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            4640
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         3.18
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    5.678
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.751487
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2004/1 (Bruker,2004) was used for absorption correction.
R(int) was 0.0478 before and 0.0212 after correction.
The Ratio of minimum to maximum transmission is 0.7515.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_modifier   yellow
_exptl_crystal_density_diffrn    2.357
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             360
_exptl_crystal_size_max          0.03
_exptl_crystal_size_mid          0.021
_exptl_crystal_size_min          0.012
_refine_diff_density_max         0.443
_refine_diff_density_min         -0.534
_refine_diff_density_rms         0.108
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     67
_refine_ls_number_reflns         1345
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0268
_refine_ls_R_factor_gt           0.0184
_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^)+(0.0212P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0390
_refine_ls_wR_factor_ref         0.0433
_reflns_number_gt                1121
_reflns_number_total             1345
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce00029f.txt
_cod_data_source_block           ilb1310_p21m
_cod_database_code               7207730