Bis(alkylidynyl)arsines.
Frogley, Benjamin J.; Hill, Anthony F.; Chemical communications (Cambridge, England) 54 (2018) 7649–7652; doi:10.1039/c8cc04164d

data_7124480
_publ_section_title
;
 Bis(alkylidynyl)arsines.
;
_journal_issue                   55
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              7649
_journal_page_last               7652
_journal_paper_doi               10.1039/c8cc04164d
_journal_volume                  54
_journal_year                    2018
_chemical_formula_moiety         'C40 H53 As B2 N12 O4 W2'
_chemical_formula_sum            'C40 H53 As B2 N12 O4 W2'
_chemical_formula_weight         1230.18
_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
;
2018-04-08 deposited with the CCDC.
2018-06-21 downloaded from the CCDC.
;
_cell_angle_alpha                68.469(2)
_cell_angle_beta                 86.621(2)
_cell_angle_gamma                85.103(2)
_cell_formula_units_Z            8
_cell_length_a                   10.7560(3)
_cell_length_b                   29.5247(8)
_cell_length_c                   32.3562(8)
_cell_measurement_reflns_used    18780
_cell_measurement_temperature    150.0(1)
_cell_measurement_theta_max      71.7280
_cell_measurement_theta_min      3.8320
_cell_volume                     9519.1(5)
_computing_cell_refinement       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.46 (Rigaku OD, 2015)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      150.0(1)
_diffrn_detector_area_resol_mean 8.1297
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0395
_diffrn_reflns_av_unetI/netI     0.0716
_diffrn_reflns_Laue_measured_fraction_full 0.989
_diffrn_reflns_Laue_measured_fraction_max 0.989
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       37
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            52125
_diffrn_reflns_point_group_measured_fraction_full 0.989
_diffrn_reflns_point_group_measured_fraction_max 0.989
_diffrn_reflns_theta_full        66.601
_diffrn_reflns_theta_max         66.601
_diffrn_reflns_theta_min         3.484
_diffrn_source                   'micro-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    9.992
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.80205
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.717
_exptl_crystal_description       block
_exptl_crystal_F_000             4800
_exptl_crystal_size_max          0.129
_exptl_crystal_size_mid          0.103
_exptl_crystal_size_min          0.033
_refine_diff_density_max         2.288
_refine_diff_density_min         -2.619
_refine_diff_density_rms         0.141
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.127
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     2310
_refine_ls_number_reflns         33274
_refine_ls_number_restraints     457
_refine_ls_restrained_S_all      1.123
_refine_ls_R_factor_all          0.0789
_refine_ls_R_factor_gt           0.0641
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0235P)^2^+68.4757P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1334
_refine_ls_wR_factor_ref         0.1414
_reflns_Friedel_coverage         0.000
_reflns_number_gt                27534
_reflns_number_total             33274
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8cc04164d2.cif
_cod_data_source_block           Compound_8
_cod_database_code               7124480
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              95320
_shelx_hkl_checksum              93519