Synthesis and Characterization of Stereoisomers of 1,4-Dihydro-1,4-diarsinines
Arita, Manabu; Naka, Kensuke; Morisaki, Yasuhiro; Nakahashi, Akiko; Chujo, Yoshiki; Organometallics 28 (2009) 6109–; doi:10.1021/om900727c

data_4070334
_publ_section_title
;
 Synthesis and Characterization of Stereoisomers of
 1,4-Dihydro-1,4-diarsinines
;
_journal_issue                   20
_journal_name_full               Organometallics
_journal_page_first              6109
_journal_paper_doi               10.1021/om900727c
_journal_volume                  28
_journal_year                    2009
_chemical_formula_moiety         'C26 H42 As2 O8'
_chemical_formula_sum            'C26 H42 As2 O8'
_chemical_formula_weight         632.44
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.743(3)
_cell_length_b                   14.6563(17)
_cell_length_c                   10.6223(9)
_cell_measurement_temperature    101(2)
_cell_volume                     3073.7(6)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        'Yadokari-XG (Wakita, 2000)'
_computing_molecular_graphics    'Yadokari-XG (Wakita, 2000)'
_computing_publication_material  'Yadokari-XG (Wakita, 2000)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'Dirdif99.2(Beurskens et al., 1999)'
_diffrn_ambient_temperature      101(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0672
_diffrn_reflns_av_sigmaI/netI    0.0443
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            28115
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.14
_exptl_absorpt_coefficient_mu    2.216
_exptl_absorpt_correction_T_max  0.5562
_exptl_absorpt_correction_T_min  0.2702
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
    Higashi, T. (1995). Program for Absorption Correction.
    Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_density_diffrn    1.367
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1312
_exptl_crystal_size_max          0.80
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.818
_refine_diff_density_min         -0.314
_refine_diff_density_rms         0.073
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.021(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     339
_refine_ls_number_reflns         6911
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0374
_refine_ls_R_factor_gt           0.0322
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0436P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0725
_refine_ls_wR_factor_ref         0.0742
_reflns_number_gt                6318
_reflns_number_total             6911
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om900727c_si_001.cif
_cod_data_source_block           DHDAtBu
_cod_database_code               4070334