Alkylation and acylation of cyclotriphosphazenes.
Benson, Mark A.; Zacchini, Stefano; Boomishankar, Ramamoorthy; Chan, Yuri; Steiner, Alexander; Inorganic chemistry 46 (2007) 7097–7108; doi:10.1021/ic7009463

data_4339895
_publ_section_title
;
 Alkylation and acylation of cyclotriphosphazenes.
;
_journal_issue                   17
_journal_name_full               'Inorganic chemistry'
_journal_page_first              7097
_journal_page_last               7108
_journal_paper_doi               10.1021/ic7009463
_journal_volume                  46
_journal_year                    2007
_chemical_formula_sum            'C20 H51 Cl N9 O P3'
_chemical_formula_weight         562.06
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           82
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4'
_symmetry_space_group_name_H-M   'I -4'
_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                   19.0853(5)
_cell_length_b                   19.0853(5)
_cell_length_c                   17.4995(9)
_cell_measurement_temperature    100(2)
_cell_volume                     6374.2(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker Smart Apex'
_diffrn_measurement_method       omega-scans
_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  0.0358
_diffrn_reflns_av_sigmaI/netI    0.0375
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            16724
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         4.10
_exptl_absorpt_coefficient_mu    0.299
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.171
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2432
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.314
_refine_diff_density_min         -0.196
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.32(6)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.008
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     350
_refine_ls_number_reflns         5600
_refine_ls_number_restraints     44
_refine_ls_restrained_S_all      1.007
_refine_ls_R_factor_all          0.0368
_refine_ls_R_factor_gt           0.0338
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0555P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0841
_refine_ls_wR_factor_ref         0.0853
_reflns_number_gt                5175
_reflns_number_total             5600
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic7009463-file003.cif
_cod_data_source_block           '[3Ac]Cl'
_cod_original_sg_symbol_H-M      I-4
_cod_database_code               4339895