Synthesis of sterically encumbered 2,4-bis-m-terphenyl-1,3-dichloro-2,4-cyclo-dipnictadiazanes [m-TerNPnCl](2), (Pn = P, As).
Reiss, Fabian; Schulz, Axel; Villinger, Alexander; Weding, Nico; Dalton transactions (Cambridge, England : 2003) 39 (2010) 9962–9972; doi:10.1039/c0dt00700e

data_7026794
_publ_section_title
;
 Synthesis of sterically encumbered
 2,4-bis-m-terphenyl-1,3-dichloro-2,4-cyclo-dipnictadiazanes
 [m-TerNPnCl](2), (Pn = P, As).
;
_journal_issue                   41
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9962
_journal_page_last               9972
_journal_paper_doi               10.1039/c0dt00700e
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C48 H50 Cl2 N2 P2'
_chemical_formula_sum            'C48 H50 Cl2 N2 P2'
_chemical_formula_weight         787.74
_chemical_name_systematic
;
1,3-dichloro-2,4-bis[2,6-bis-(2,4,6-trimethylphenyl)phenyl]-cyclo-1,3-
diphospha-2,4-diazane
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 102.56(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.912(4)
_cell_length_b                   8.8080(18)
_cell_length_c                   24.420(5)
_cell_measurement_reflns_used    9294
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      49.623
_cell_measurement_theta_min      5.065
_cell_volume                     4180.4(16)
_computing_cell_refinement       'Bruker Apex v7.51a'
_computing_data_collection       'Bruker Apex v7.51a'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'ORTEP-3v2.01 (Farrugia, 1997)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker-Nonius Apex-X8-CCD-diffractometer'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0363
_diffrn_reflns_av_sigmaI/netI    0.0228
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            31428
_diffrn_reflns_theta_full        24.95
_diffrn_reflns_theta_max         24.95
_diffrn_reflns_theta_min         2.40
_exptl_absorpt_coefficient_mu    0.268
_exptl_absorpt_correction_T_max  0.9815
_exptl_absorpt_correction_T_min  0.8890
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 2004)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.252
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1664
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.426
_refine_diff_density_min         -0.450
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     250
_refine_ls_number_reflns         3656
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0495
_refine_ls_R_factor_gt           0.0383
_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^)+(0.0420P)^2^+6.1046P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0912
_refine_ls_wR_factor_ref         0.0982
_reflns_number_gt                3041
_reflns_number_total             3656
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c0dt00700e.txt
_cod_data_source_block           ter2n2p2cl2
_cod_original_cell_volume        4180.5(15)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7026794