Alkyne and Reversible Nitrile Activation: N,N'-Diamidocarbene-Facilitated Synthesis of Cyclopropenes, Cyclopropenones, and Azirines
Jonathan P. Moerdyk; Christopher W. Bielawski; Journal of the American Chemical Society 134 (2012) 6116–6119; doi:10.1021/ja3014105

data_4117809
_publ_contact_author_address
'The University of Texas at Austin, Austin, TX 78712, United States'
_publ_contact_author_email       bielawski@cm.utexas.edu
_publ_contact_author_fax         512-471-8696
_publ_contact_author_name        'Christopher W. Bielawski'
_publ_contact_author_phone       512-232-3839
_publ_section_title
;
 Alkyne and Reversible Nitrile Activation: N,N'-Diamidocarbene-Facilitated
 Synthesis of Cyclopropenes, Cyclopropenones, and Azirines
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6116
_journal_page_last               6119
_journal_paper_doi               10.1021/ja3014105
_journal_volume                  134
_journal_year                    2012
_chemical_formula_moiety         'C30 H28 N6 O2'
_chemical_formula_sum            'C31 H29 Cl3 N6 O2'
_chemical_formula_weight         623.95
_chemical_name_common            DACTetracyanoethylene
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                70.128(5)
_cell_angle_beta                 61.921(4)
_cell_angle_gamma                73.727(5)
_cell_formula_units_Z            2
_cell_length_a                   11.880(3)
_cell_length_b                   12.278(3)
_cell_length_c                   12.464(3)
_cell_measurement_temperature    150(2)
_cell_volume                     1492.6(6)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'CCD area detector'
_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     0.71075
_diffrn_reflns_av_R_equivalents  0.1077
_diffrn_reflns_av_sigmaI/netI    0.1142
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            21392
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.20
_exptl_absorpt_coefficient_mu    0.347
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.388
_exptl_crystal_description       plate
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.653
_refine_diff_density_min         -0.820
_refine_diff_density_rms         0.092
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.006
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     387
_refine_ls_number_reflns         5161
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.1580
_refine_ls_R_factor_gt           0.0863
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0733P)^2^+6.8759P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1811
_refine_ls_wR_factor_ref         0.2205
_reflns_number_gt                2929
_reflns_number_total             5161
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja3014105_si_002_7.cif
_cod_data_source_block           DACTetracyanoethylene6
_cod_database_code               4117809