An unprecedented 1,4-diphospha-2,3-disila butadiene (-P[double bond, length as m-dash]Si-Si[double bond, length as m-dash]P-) derivative and a 1,3-diphospha-2-silaallyl anion, each stabilized by the amidinate ligand.
Kundu, Subrata; Mohapatra, Chandrajeet; Samuel, Prinson P.; Kretsch, Johannes; Walawalkar, M. G.; Herbst-Irmer, Regine; Stalke, Dietmar; De, Sriman; Koley, Debasis; Roesky, Herbert W.; Chemical communications (Cambridge, England) 53 (2016) 192–195; doi:10.1039/c6cc09171g

data_7119593
_publ_section_title
;
 An unprecedented 1,4-diphospha-2,3-disila butadiene (-P[double bond,
 length as m-dash]Si-Si[double bond, length as m-dash]P-) derivative and a
 1,3-diphospha-2-silaallyl anion, each stabilized by the amidinate ligand.
;
_journal_issue                   1
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              192
_journal_page_last               195
_journal_paper_doi               10.1039/c6cc09171g
_journal_volume                  53
_journal_year                    2016
_chemical_formula_moiety         'C45 H69 N2 P2 Si C16 H32 K O7'
_chemical_formula_sum            'C61 H101 K N2 O7 P2 Si'
_chemical_formula_weight         1103.56
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-10-01 deposited with the CCDC.
2016-12-05 downloaded from the CCDC.
;
_cell_angle_alpha                101.050(10)
_cell_angle_beta                 103.860(10)
_cell_angle_gamma                100.660(10)
_cell_formula_units_Z            2
_cell_length_a                   10.771(3)
_cell_length_b                   13.848(3)
_cell_length_c                   22.433(5)
_cell_measurement_reflns_used    9779
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      20.149
_cell_measurement_theta_min      2.2185
_cell_volume                     3093.4(13)
_computing_cell_refinement       'SAINT V8.34A'
_computing_data_collection       'APEX2 v2012.2'
_computing_data_reduction        'SAINT V8.34A'
_computing_molecular_graphics    'XP Version 5.1'
_computing_publication_material  'XP Version 5.1'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution
'SHELXT (G.M.Sheldrick,Acta Cryst.(2015)A71,3-8)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker Smart APEX II Quazar'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           AgK\a
_diffrn_radiation_wavelength     0.56086
_diffrn_reflns_av_R_equivalents  0.0419
_diffrn_reflns_av_unetI/netI     0.0224
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            127873
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        19.665
_diffrn_reflns_theta_max         20.289
_diffrn_reflns_theta_min         1.523
_diffrn_source                   'INCOATEC Microsource'
_exptl_absorpt_coefficient_mu    0.114
_exptl_absorpt_correction_T_max  0.7445
_exptl_absorpt_correction_T_min  0.7138
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS-2014/5
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.185
_exptl_crystal_description       block
_exptl_crystal_F_000             1200
_exptl_crystal_size_max          0.424
_exptl_crystal_size_mid          0.279
_exptl_crystal_size_min          0.152
_refine_diff_density_max         0.471
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.043
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     848
_refine_ls_number_reflns         12250
_refine_ls_number_restraints     1901
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0416
_refine_ls_R_factor_gt           0.0331
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0312P)^2^+1.8591P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0764
_refine_ls_wR_factor_ref         0.0813
_reflns_Friedel_coverage         0.000
_reflns_number_gt                10530
_reflns_number_total             12250
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6cc09171g2.cif
_cod_data_source_block           sub6
_cod_database_code               7119593
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.953
_shelx_estimated_absorpt_t_max   0.983
_shelx_res_checksum              72535