Supramolecular reaction between pressure-frozen acetonitrile phases alpha and beta.
Olejniczak, Anna; Katrusiak, Andrzej; The journal of physical chemistry. B 112 (2008) 7183–7190; doi:10.1021/jp800753n

data_1504383
_publ_section_title
;
 Supramolecular reaction between pressure-frozen acetonitrile phases alpha
 and beta.
;
_journal_issue                   24
_journal_name_full               'The journal of physical chemistry. B'
_journal_page_first              7183
_journal_page_last               7190
_journal_paper_doi               10.1021/jp800753n
_journal_volume                  112
_journal_year                    2008
_chemical_formula_moiety         'C2 H3 N1'
_chemical_formula_sum            'C2 H3 N'
_chemical_formula_weight         41.05
_chemical_melting_point          228
_chemical_name_common            acetonitrile
_chemical_name_systematic
;
acetonitrile
;
_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                 99.33(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   3.9838(8)
_cell_length_b                   8.1352(16)
_cell_length_c                   7.8165(16)
_cell_measurement_pressure       570000
_cell_measurement_reflns_used    268
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      29.83
_cell_measurement_theta_min      3.64
_cell_volume                     249.97(9)
_computing_cell_refinement       'CrysAlis (Oxford Diffraction, 2002)'
_computing_data_collection       'CrysAlis (Oxford Diffraction, 2002)'
_computing_data_reduction        'CrysAlis (Oxford Diffraction, 2002)'
_computing_molecular_graphics
;X-Seed (Barbour, 2001) 
and POV-Ray (Persistence of Vision, 2004)
;
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 16.4
_diffrn_measured_fraction_theta_full 0.370
_diffrn_measured_fraction_theta_max 0.370
_diffrn_measurement_device_type  'Kuma KM4CCD \k geometry'
_diffrn_measurement_method
;HP omega scans - for more details see:
A. Budzianowski, A. Katrusiak in High-Pressure Crystallography
(Eds.: A. Katrusiak, P. F. McMillan),
Dordrecht: Kluwer Acad. Publ., 2004 pp.157-168
;
_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  0.0846
_diffrn_reflns_av_sigmaI/netI    0.0315
_diffrn_reflns_limit_h_max       2
_diffrn_reflns_limit_h_min       -2
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            1895
_diffrn_reflns_theta_full        29.83
_diffrn_reflns_theta_max         29.83
_diffrn_reflns_theta_min         3.64
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  0.85
_exptl_absorpt_correction_T_min  0.37
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
Katrusiak, A. (2003). REDSHADE - Program for correcting
reflections intensities for DAC absorption, gasket shadowing
and sample crystal absorption. Adam Mickiewicz University, Pozna\'n.
Katrusiak, A. (2004). Z. Kristallogr. 219, 461-467
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.091
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             88
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.38
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.076
_refine_diff_density_min         -0.101
_refine_diff_density_rms         0.027
_refine_ls_extinction_coef       0.20(17)
_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   1.331
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     29
_refine_ls_number_reflns         268
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.331
_refine_ls_R_factor_all          0.0818
_refine_ls_R_factor_gt           0.0706
_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^)+(0.0759P)^2^+0.0320P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1656
_refine_ls_wR_factor_ref         0.1724
_reflns_number_gt                240
_reflns_number_total             268
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp800753n-file002.cif
_cod_data_source_block           acn057A
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 2(1)/c'
_cod_database_code               1504383