Anion‒Anion Interactions in the Crystal Packing of Functionalized Methanide Anions: An Experimental and Computational Study
Chesman, Anthony S. R.; Hodgson, Jennifer L.; Izgorodina, Ekaterina I.; Urbatsch, Aron; Turner, David R.; Deacon, Glen B.; Batten, Stuart R.; Crystal Growth & Design 14 (2014) 1922–; doi:10.1021/cg500051m

data_4510362
_publ_section_title
;
 Anion--Anion Interactions in the Crystal Packing of Functionalized
 Methanide Anions: An Experimental and Computational Study
;
_journal_issue                   4
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              1922
_journal_paper_doi               10.1021/cg500051m
_journal_volume                  14
_journal_year                    2014
_chemical_formula_moiety         'C3 N3 O2, C4 H12 N'
_chemical_formula_sum            'C7 H12 N4 O2'
_chemical_formula_weight         184.21
_chemical_name_common            (Me4N)(dcnom)
_chemical_name_systematic
;
 Tetramethylammonium dicyanonitromethanide
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 109.555(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   11.5852(12)
_cell_length_b                   15.6154(19)
_cell_length_c                   11.3954(11)
_cell_measurement_reflns_used    15447
_cell_measurement_temperature    173(1)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      3.63
_cell_volume                     1942.6(4)
_computing_cell_refinement       'Bruker SMART (Bruker)'
_computing_data_collection       'Bruker SMART (Bruker)'
_computing_data_reduction        'Bruker SAINT (Bruker)'
_computing_molecular_graphics    'X-Seed (Barbour, 1999)'
_computing_publication_material  'CIFTAB (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(1)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker X8 Apex II CCD'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0318
_diffrn_reflns_av_sigmaI/netI    0.0331
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            15447
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.63
_exptl_absorpt_coefficient_mu    0.095
_exptl_absorpt_correction_T_max  0.9905
_exptl_absorpt_correction_T_min  0.9812
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.260
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             784
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.205
_refine_diff_density_min         -0.307
_refine_diff_density_rms         0.051
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     243
_refine_ls_number_reflns         4453
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0660
_refine_ls_R_factor_gt           0.0463
_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^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1161
_refine_ls_wR_factor_ref         0.1273
_reflns_number_gt                3251
_reflns_number_total             4453
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            2-(Me4N)(dcnom).CIF
_cod_data_source_block           (Me4N)(dcnom).CIF
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to
/usr/data/users/saulius/automatic-downloads/current/ACS/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 
;
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4510362