Synthesis and X-ray Characterization of Alkali Metal 2-Acyl-1,1,3,3-tetracyanopropenides.
Karpov, Sergey V.; Grigor'ev, Arthur A.; Kayukov, Yakov S.; Karpova, Irina V.; Nasakin, Oleg E.; Tafeenko, Victor A.; The Journal of organic chemistry 81 (2016) 6402–6408; doi:10.1021/acs.joc.6b01040

data_4036941
_publ_section_title
;
 Synthesis and X-ray Characterization of Alkali Metal
 2-Acyl-1,1,3,3-tetracyanopropenides.
;
_journal_issue                   15
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              6402
_journal_page_last               6408
_journal_paper_doi               10.1021/acs.joc.6b01040
_journal_volume                  81
_journal_year                    2016
_chemical_formula_moiety         'C14 H7 N4 Na O2'
_chemical_formula_sum            'C14 H7 N4 Na O2'
_chemical_formula_weight         286.23
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_audit_creation_method           SHELXL-2013
_cell_angle_alpha                90
_cell_angle_beta                 92.739(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.1536(2)
_cell_length_b                   10.1851(2)
_cell_length_c                   16.6349(5)
_cell_measurement_reflns_used    1654
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      54.43
_cell_measurement_theta_min      6.34
_cell_volume                     1379.87(6)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      295
_diffrn_detector                 Pilatus100K
_diffrn_detector_area_resol_mean 5.81
_diffrn_detector_type            STOE
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  STOE
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_collimation    'focusing mirrors'
_diffrn_radiation_monochromator  none
_diffrn_radiation_polarisn_norm  0
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54186
_diffrn_reflns_av_R_equivalents  0.0390
_diffrn_reflns_av_unetI/netI     0.0407
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            5886
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.988
_diffrn_reflns_theta_full        67.686
_diffrn_reflns_theta_max         73.234
_diffrn_reflns_theta_min         5.093
_diffrn_source                   'Cu GeniX 3D'
_diffrn_source_current           0.600
_diffrn_source_power             0.030
_diffrn_source_voltage           50
_exptl_absorpt_coefficient_mu    1.073
_exptl_absorpt_correction_T_max  0.970
_exptl_absorpt_correction_T_min  0.821
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
[c.f. r.h. blessing, acta cryst. (1995), a51, 33-38]
;
_exptl_crystal_colour            GREEN
_exptl_crystal_density_diffrn    1.378
_exptl_crystal_description       PRISM
_exptl_crystal_F_000             584
_exptl_crystal_size_max          .18
_exptl_crystal_size_mid          .15
_exptl_crystal_size_min          .15
_refine_diff_density_max         0.328
_refine_diff_density_min         -0.271
_refine_diff_density_rms         0.052
_refine_ls_extinction_coef       0.0192(16)
_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   1.052
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     219
_refine_ls_number_reflns         2727
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0590
_refine_ls_R_factor_gt           0.0460
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0903P)^2^+0.0421P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1347
_refine_ls_wR_factor_ref         0.1446
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2046
_reflns_number_total             2727
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo6b01040_si_002.cif
_cod_data_source_block           shelx
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4036941
_shelxl_version_number           2013-4
_shelx_res_checksum              33739
_shelx_hkl_checksum              14253