Exploring the chemistry of n,n'-diamidocarbenes with organophosphorus compounds.
Chase, Daniel T.; Moerdyk, Jonathan P.; Bielawski, Christopher W.; Organic letters 16 (2014) 812–815; doi:10.1021/ol4035484

data_1513477
_publ_section_title
;
 Exploring the chemistry of n,n'-diamidocarbenes with organophosphorus
 compounds.
;
_journal_issue                   3
_journal_name_full               'Organic letters'
_journal_page_first              812
_journal_page_last               815
_journal_paper_doi               10.1021/ol4035484
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C25 H30 N2 O2'
_chemical_formula_sum            'C25 H30 N2 O2'
_chemical_formula_weight         390.51
_chemical_name_common            DACMethylene
_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                 96.725(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.441(7)
_cell_length_b                   16.218(13)
_cell_length_c                   15.825(13)
_cell_measurement_temperature    150(2)
_cell_volume                     2151(3)
_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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.1297
_diffrn_reflns_av_sigmaI/netI    0.0802
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            24428
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.80
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.206
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             840
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.244
_refine_diff_density_min         -0.309
_refine_diff_density_rms         0.060
_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     270
_refine_ls_number_reflns         3780
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.006
_refine_ls_R_factor_all          0.1377
_refine_ls_R_factor_gt           0.0889
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1031P)^2^+3.0303P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2025
_refine_ls_wR_factor_ref         0.2377
_reflns_number_gt                2404
_reflns_number_total             3780
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol4035484_si_002.cif
_cod_data_source_block           DACMethylene
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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               1513477