Synthesis and characterisation of bulky guanidines and phosphaguanidines: precursors for low oxidation state metallacycles
Jin, Guoxia; Jones, Cameron; Junk, Peter C.; Lippert, Kai-Alexander; Rose, Richard P.; Stasch, Andreas; New Journal of Chemistry 33 (2009) 64–; doi:10.1039/b809120j

data_7051581
_publ_section_title
;
 Synthesis and characterisation of bulky guanidines and
 phosphaguanidines: precursors for low oxidation state metallacycles
;
_journal_issue                   1
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              64
_journal_paper_doi               10.1039/b809120j
_journal_volume                  33
_journal_year                    2009
_chemical_formula_sum            'C31 H49 N3'
_chemical_formula_weight         463.73
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.397(4)
_cell_length_b                   15.542(3)
_cell_length_c                   20.168(4)
_cell_measurement_temperature    150(2)
_cell_volume                     5767(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_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  0.0382
_diffrn_reflns_av_sigmaI/netI    0.0292
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            19664
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         3.02
_exptl_absorpt_coefficient_mu    0.062
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.961
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav (Blessing, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.068
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2048
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.341
_refine_diff_density_min         -0.350
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     319
_refine_ls_number_reflns         5343
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0577
_refine_ls_R_factor_gt           0.0435
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0495P)^2^+1.7216P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1004
_refine_ls_wR_factor_ref         0.1069
_reflns_number_gt                4348
_reflns_number_total             5343
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b809120j.txt
_cod_data_source_block           compound2
_cod_original_sg_symbol_H-M      Pbca
_cod_database_code               7051581