Isolation of an Intermediate in the Catalytic Trimerization of Isocyanates by a Monomeric Calcium Carbene with Chelating Iminophosphorane Substituents
Orzechowski, Lars; Harder, Sjoerd; Organometallics 26 (2007) 2144–; doi:10.1021/om070023n

data_4073038
_publ_section_title
;
 Isolation of an Intermediate in the Catalytic Trimerization of
 Isocyanates by a Monomeric Calcium Carbene with Chelating
 Iminophosphorane Substituents
;
_journal_issue                   9
_journal_name_full               Organometallics
_journal_page_first              2144
_journal_paper_doi               10.1021/om070023n
_journal_volume                  26
_journal_year                    2007
_chemical_formula_sum            'C80 H88 Ca N2 O2 P2'
_chemical_formula_weight         1211.54
_chemical_name_common            C(Ph2P=N-(2,6-iPr-C6H3))Ca(THF).O=CPh2
_chemical_name_systematic
;
 ?
;
_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                 93.049(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.8306(5)
_cell_length_b                   25.8906(9)
_cell_length_c                   22.1311(7)
_cell_measurement_temperature    203(2)
_cell_volume                     7341.4(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0767
_diffrn_reflns_av_sigmaI/netI    0.0328
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            206914
_diffrn_reflns_theta_full        25.36
_diffrn_reflns_theta_max         25.36
_diffrn_reflns_theta_min         1.21
_exptl_absorpt_coefficient_mu    0.174
_exptl_absorpt_correction_T_max  0.9497
_exptl_absorpt_correction_T_min  0.9497
_exptl_crystal_density_diffrn    1.096
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             2592
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.539
_refine_diff_density_min         -0.373
_refine_diff_density_rms         0.047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.101
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     784
_refine_ls_number_reflns         13444
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.0668
_refine_ls_R_factor_gt           0.0527
_refine_ls_shift/su_max          0.014
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0600P)^2^+4.8166P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1372
_refine_ls_wR_factor_ref         0.1444
_reflns_number_gt                11243
_reflns_number_total             13444
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om070023nsi20070109_093247.cif
_cod_data_source_block           hasj51
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4073038