Unsuccessful/successful attempts to produce penta(heteroaryl)-phosphoranes/-arsoranes R5E (E = P, As; R = 2-furyl, 2-thienyl).
Monkowius, Uwe V.; Nogai, Stefan; Schmidbaur, Hubert; Dalton transactions (Cambridge, England : 2003)  (2004) 1610–1617; doi:10.1039/b401988a

data_7014149
_publ_section_title
;
 Unsuccessful/successful attempts to produce
 penta(heteroaryl)-phosphoranes/-arsoranes R5E (E = P, As; R = 2-furyl,
 2-thienyl).
;
_journal_issue                   10
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1610
_journal_page_last               1617
_journal_paper_doi               10.1039/b401988a
_journal_year                    2004
_chemical_formula_sum            'C20 H15 As O5'
_chemical_formula_weight         410.24
_chemical_name_systematic
;
?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 114.7230(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.3740(2)
_cell_length_b                   8.64050(10)
_cell_length_c                   12.6277(2)
_cell_measurement_reflns_used    23736
_cell_measurement_temperature    143(2)
_cell_volume                     1721.91(4)
_computing_cell_refinement       DENZO
_computing_data_collection       XPRESS
_computing_data_reduction        SCALEPACK
_computing_molecular_graphics    SHELXTL-PLUS
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      143(2)
_diffrn_measured_fraction_theta_full 0.966
_diffrn_measured_fraction_theta_max 0.966
_diffrn_measurement_device_type  'NONIUS DIP 2020'
_diffrn_measurement_method       phi-rotation
_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  0.028
_diffrn_reflns_av_sigmaI/netI    0.0221
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            23736
_diffrn_reflns_theta_full        26.85
_diffrn_reflns_theta_max         26.85
_diffrn_reflns_theta_min         3.41
_exptl_absorpt_coefficient_mu    2.003
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.582
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             832
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.416
_refine_diff_density_min         -1.084
_refine_diff_density_rms         0.096
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.051
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     156
_refine_ls_number_reflns         1790
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.051
_refine_ls_R_factor_all          0.0354
_refine_ls_R_factor_gt           0.0353
_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^)+(0.0692P)^2^+1.8622P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0912
_refine_ls_wR_factor_ref         0.0913
_reflns_number_gt                1780
_reflns_number_total             1790
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b401988a.txt
_cod_data_source_block           uwe35
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7014149