2-(1,2,3,4-Tetrahydrophenanthren-1-ylidene)malononitrile
Ettenger, George B.; Williams, Brian Wesley; Brillhart, Daniel; Kastner, Margaret E.; Acta Crystallographica Section E 65 (2009) o1711–; doi:10.1107/S1600536809023988

data_2222433
_publ_section_title
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 2-(1,2,3,4-Tetrahydrophenanthren-1-ylidene)malononitrile
;
_journal_coeditor_code           PV2168
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1711
_journal_paper_doi               10.1107/S1600536809023988
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C17 H12 N2'
_chemical_formula_moiety         'C17 H12 N2'
_chemical_formula_sum            'C17 H12 N2'
_chemical_formula_weight         244.29
_chemical_name_systematic
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2-(1,2,3,4-Tetrahydrophenanthren-1-ylidene)malononitrile
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 93.016(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.3990(9)
_cell_length_b                   16.190(3)
_cell_length_c                   10.4570(13)
_cell_measurement_reflns_used    27
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.
_cell_measurement_theta_min      20.
_cell_volume                     1250.9(3)
_computing_cell_refinement       'XSCANS (Bruker, 1996)'
_computing_data_collection       'XSCANS (Bruker, 1996)'
_computing_data_reduction        'XSCANS (Bruker, 1996)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       2\q/\w
_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  0.0442
_diffrn_reflns_av_sigmaI/netI    0.1133
_diffrn_reflns_limit_h_max       1
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -1
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            4319
_diffrn_reflns_theta_full        28.49
_diffrn_reflns_theta_max         28.49
_diffrn_reflns_theta_min         2.52
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 97
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.297
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             512
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.221
_refine_diff_density_min         -0.207
_refine_ls_extinction_coef       0.020(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.981
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         3151
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.981
_refine_ls_R_factor_all          0.1883
_refine_ls_R_factor_gt           0.0719
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0683P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1329
_refine_ls_wR_factor_ref         0.1763
_reflns_number_gt                1297
_reflns_number_total             3151
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            pv2168.cif
_cod_data_source_block           I
_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_enum 1527 2010-12-29 10:47:43Z saulius 

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 21/n'
_cod_database_code               2222433
_cod_database_fobs_code          2222433