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_7014148
_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            'C12 H9 As O3'
_chemical_formula_weight         276.11
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.79090(10)
_cell_length_b                   8.16180(10)
_cell_length_c                   17.2498(3)
_cell_measurement_reflns_used    29571
_cell_measurement_temperature    143(2)
_cell_volume                     1096.88(3)
_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 0.974
_diffrn_measured_fraction_theta_max 0.974
_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  0.045
_diffrn_reflns_av_sigmaI/netI    0.0267
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            29571
_diffrn_reflns_theta_full        26.73
_diffrn_reflns_theta_max         26.73
_diffrn_reflns_theta_min         3.44
_exptl_absorpt_coefficient_mu    3.086
_exptl_absorpt_correction_T_max  0.892
_exptl_absorpt_correction_T_min  0.634
_exptl_absorpt_correction_type   refdelf
_exptl_absorpt_process_details
;
Platon Delabs
(See: Walker, N. & Stuart, D. (1983) Acta Cryst. A39, 158-166)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.672
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             552
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.500
_refine_diff_density_min         -0.220
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.026(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.127
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     181
_refine_ls_number_reflns         2263
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.128
_refine_ls_R_factor_all          0.0178
_refine_ls_R_factor_gt           0.0177
_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^)+(0.0248P)^2^+0.1032P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0467
_refine_ls_wR_factor_ref         0.0468
_reflns_number_gt                2243
_reflns_number_total             2263
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b401988a.txt
_cod_data_source_block           uwe34
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               7014148