X-ray Crystal Structures of α-KrF2, [KrF][MF6] (M = As, Sb, Bi), [Kr2F3][SbF6].KrF2, [Kr2F3]2[SbF6]2.KrF2, and [Kr2F3][AsF6].[KrF][AsF6]; Synthesis and Characterization of [Kr2F3][PF6].nKrF2; and Theoretical Studies of KrF2, KrF+, Kr2F3+, and the [KrF][MF6] (M = P, As, Sb, Bi) Ion Pairs
John F. Lehmann; David A. Dixon; Gary J. Schrobilgen; Inorganic Chemistry 40 (2001) 3002–3017; doi:10.1021/ic001167w

data_4319839
_publ_section_title
;
 X-ray Crystal Structures of \a-KrF2, [KrF][MF6] (M = As, Sb, Bi),
 [Kr2F3][SbF6].KrF2, [Kr2F3]2[SbF6]2.KrF2, and [Kr2F3][AsF6].[KrF][AsF6];
 Synthesis and Characterization of [Kr2F3][PF6].nKrF2; and Theoretical
 Studies of KrF2, KrF+, Kr2F3+, and the [KrF][MF6] (M = P, As, Sb, Bi) Ion
 Pairs
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              3002
_journal_page_last               3017
_journal_paper_doi               10.1021/ic001167w
_journal_volume                  40
_journal_year                    2001
_chemical_formula_sum            'F2 Kr'
_chemical_formula_weight         121.80
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           139
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4 2'
_symmetry_space_group_name_H-M   'I 4/m m m'
_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            2
_cell_length_a                   4.1744(6)
_cell_length_b                   4.1744(6)
_cell_length_c                   6.5047(13)
_cell_measurement_temperature    293(2)
_cell_volume                     113.35(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.0273
_diffrn_reflns_av_sigmaI/netI    0.0142
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            386
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         5.81
_exptl_absorpt_coefficient_mu    19.591
_exptl_crystal_density_diffrn    3.569
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             108
_refine_diff_density_max         0.689
_refine_diff_density_min         -0.907
_refine_diff_density_rms         0.165
_refine_ls_extinction_coef       0.014(14)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.293
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     7
_refine_ls_number_reflns         55
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.293
_refine_ls_R_factor_all          0.0251
_refine_ls_R_factor_gt           0.0251
_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^)+(0.0409P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0548
_refine_ls_wR_factor_ref         0.0548
_reflns_number_gt                55
_reflns_number_total             55
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic001167w_1.cif
_cod_data_source_block           KrF2
_cod_database_code               4319839