#------------------------------------------------------------------------------
#$Date: 2016-03-26 12:58:28 +0100 (Sat 26 de Mar de 2016) $
#$Revision: 180242 $
#$URL: svn://www.crystallography.net/cod/cif/7/11/28/7112844.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_7112844
loop_
_publ_author_name
'Wang, Dehui'
'Zhang, Bingguang'
'He, Cheng'
'Wu, Pengyan'
'Duan, Chunying'
_publ_section_title
;
 A new chiral N-heterocyclic carbene silver(I) cylinder: synthesis,
 crystal structure and catalytic properties.
;
_journal_issue                   26
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              4728
_journal_page_last               4730
_journal_paper_doi               10.1039/c000793e
_journal_volume                  46
_journal_year                    2010
_chemical_formula_sum            'C92 H118 Ag3 B3 Cl4 F12 N12 O3'
_chemical_formula_weight         2165.82
_chemical_name_systematic
;
?
;
_space_group_IT_number           173
_symmetry_cell_setting           hexagonal
_symmetry_space_group_name_Hall  'P 6c'
_symmetry_space_group_name_H-M   'P 63'
_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                120.00
_cell_formula_units_Z            2
_cell_length_a                   14.5393(3)
_cell_length_b                   14.5393(3)
_cell_length_c                   27.7615(13)
_cell_measurement_temperature    298(2)
_cell_volume                     5082.3(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0702
_diffrn_reflns_av_sigmaI/netI    0.1980
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       32
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            26297
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.78
_exptl_absorpt_coefficient_mu    0.751
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.415
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2220
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.815
_refine_diff_density_min         -0.575
_refine_diff_density_rms         0.101
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.32(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.877
_refine_ls_hydrogen_treatment    'riding mode'
_refine_ls_matrix_type           full
_refine_ls_number_parameters     407
_refine_ls_number_reflns         5879
_refine_ls_number_restraints     509
_refine_ls_restrained_S_all      0.884
_refine_ls_R_factor_all          0.1394
_refine_ls_R_factor_gt           0.0759
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[σ²(Fo²)+(0.0650P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1978
_refine_ls_wR_factor_ref         0.2141
_reflns_number_gt                2506
_reflns_number_total             5879
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c000793e.txt
_cod_data_source_block           ag1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Hexagonal' changed to 'hexagonal'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      P6(3)
_cod_database_code               7112844
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-y, x-y, z'
'-x+y, -x, z'
'-x, -y, z+1/2'
'y, -x+y, z+1/2'
'x-y, x, z+1/2'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_assembly
_atom_site_disorder_group
Ag1 Ag 0.01447(5) 0.32927(5) 0.32006(8) 0.0655(2) Uani 1 1 d . . .
N1 N -0.0416(4) 0.3553(6) 0.21278(18) 0.070(3) Uani 1 1 d D . .
N2 N 0.0809(4) 0.3060(5) 0.21861(17) 0.075(3) Uani 1 1 d D . .
N3 N 0.0550(5) 0.2776(5) 0.42736(19) 0.068(3) Uani 1 1 d DU . .
N4 N -0.0207(5) 0.3784(5) 0.42368(18) 0.064(3) Uani 1 1 d D . .
C1 C 0.0085(4) 0.3217(6) 0.2453(2) 0.041(3) Uani 1 1 d DU . .
C2 C 0.0035(5) 0.3654(6) 0.1663(2) 0.059(3) Uani 1 1 d DU . .
H2A H 0.0605 0.4393 0.1627 0.071 Uiso 1 1 calc R . .
C3 C -0.0701(6) 0.3396(8) 0.1233(2) 0.079(3) Uani 1 1 d DU . .
H3A H -0.1301 0.2684 0.1271 0.095 Uiso 1 1 calc R . .
H3B H -0.0973 0.3885 0.1228 0.095 Uiso 1 1 calc R . .
C4 C -0.0167(6) 0.3464(7) 0.0757(3) 0.094(4) Uani 1 1 d DU . .
H4A H -0.0701 0.3089 0.0512 0.112 Uiso 1 1 calc R . .
H4B H 0.0255 0.4201 0.0660 0.112 Uiso 1 1 calc R . .
C5 C 0.0530(6) 0.2988(7) 0.0801(3) 0.069(3) Uani 1 1 d DU . .
H5A H 0.1007 0.3229 0.0527 0.083 Uiso 1 1 calc R . .
H5B H 0.0080 0.2225 0.0768 0.083 Uiso 1 1 calc R . .
C6 C 0.1217(6) 0.3192(8) 0.1259(2) 0.078(3) Uani 1 1 d DU . .
H6A H 0.1520 0.2730 0.1259 0.094 Uiso 1 1 calc R . .
H6B H 0.1795 0.3922 0.1262 0.094 Uiso 1 1 calc R . .
C7 C 0.0545(6) 0.2983(7) 0.1695(2) 0.073(3) Uani 1 1 d DU . .
H7A H -0.0041 0.2253 0.1654 0.088 Uiso 1 1 calc R . .
C8 C 0.1308(6) 0.2525(7) 0.2356(3) 0.066(3) Uani 1 1 d DU . .
H8A H 0.1036 0.1858 0.2184 0.079 Uiso 1 1 calc R . .
H8B H 0.1140 0.2363 0.2694 0.079 Uiso 1 1 calc R . .
C9 C 0.2532(4) 0.3177(5) 0.2295(3) 0.041(2) Uani 1 1 d DU . .
C10 C 0.3092(5) 0.2724(7) 0.2115(4) 0.084(4) Uani 1 1 d DU . .
H10A H 0.2743 0.2012 0.2026 0.101 Uiso 1 1 calc R . .
C11 C 0.4169(5) 0.3334(5) 0.2068(3) 0.052(3) Uani 1 1 d D . .
H11A H 0.4539 0.3072 0.1897 0.063 Uiso 1 1 calc R . .
C12 C 0.4714(5) 0.4327(5) 0.2269(3) 0.047(3) Uani 1 1 d D . .
C13 C 0.4109(5) 0.4770(5) 0.2451(3) 0.057(3) Uani 1 1 d D . .
H13A H 0.4447 0.5481 0.2540 0.069 Uiso 1 1 calc R . .
C14 C 0.3009(5) 0.4146(6) 0.2495(4) 0.075(3) Uani 1 1 d DU . .
H14A H 0.2619 0.4394 0.2659 0.090 Uiso 1 1 calc R . .
C15 C 0.5963(7) 0.4965(8) 0.2292(4) 0.094(4) Uani 1 1 d D . .
H15A H 0.6179 0.4968 0.2623 0.113 Uiso 1 1 calc R . .
H15B H 0.6231 0.4591 0.2101 0.113 Uiso 1 1 calc R . .
C16 C 0.0313(6) 0.3382(6) 0.3960(2) 0.066(4) Uani 1 1 d DU . .
C17 C 0.0639(6) 0.3217(6) 0.47397(19) 0.064(3) Uani 1 1 d DU . .
H17A H 0.1313 0.3890 0.4750 0.077 Uiso 1 1 calc R . .
C18 C 0.0603(7) 0.2580(6) 0.5179(2) 0.065(3) Uani 1 1 d DU . .
H18A H 0.1110 0.2336 0.5148 0.078 Uiso 1 1 calc R . .
H18B H -0.0101 0.1969 0.5220 0.078 Uiso 1 1 calc R . .
C19 C 0.0890(7) 0.3347(7) 0.5607(3) 0.094(3) Uani 1 1 d DU . .
H19A H 0.0825 0.2979 0.5908 0.113 Uiso 1 1 calc R . .
H19B H 0.1614 0.3929 0.5577 0.113 Uiso 1 1 calc R . .
C20 C 0.0128(7) 0.3755(8) 0.5596(3) 0.070(3) Uani 1 1 d DU . .
H20A H 0.0350 0.4291 0.5845 0.083 Uiso 1 1 calc R . .
H20B H -0.0558 0.3171 0.5693 0.083 Uiso 1 1 calc R . .
C21 C -0.0059(8) 0.4226(7) 0.5144(2) 0.079(3) Uani 1 1 d DU . .
H21A H 0.0552 0.4920 0.5081 0.095 Uiso 1 1 calc R . .
H21B H -0.0676 0.4309 0.5186 0.095 Uiso 1 1 calc R . .
C22 C -0.0236(6) 0.3481(6) 0.4723(2) 0.071(3) Uani 1 1 d DU . .
H22A H -0.0910 0.2823 0.4777 0.086 Uiso 1 1 calc R . .
C23 C -0.0770(7) 0.4302(6) 0.4071(3) 0.061(3) Uani 1 1 d DU . .
H23A H -0.1416 0.4025 0.4260 0.073 Uiso 1 1 calc R . .
H23B H -0.0985 0.4075 0.3741 0.073 Uiso 1 1 calc R . .
C24 C -0.0232(6) 0.5536(6) 0.4079(4) 0.093(3) Uani 1 1 d DU . .
C25 C 0.0774(7) 0.6162(6) 0.3885(5) 0.116(4) Uani 1 1 d DU . .
H25A H 0.1117 0.5844 0.3735 0.139 Uiso 1 1 calc R . .
C26 C 0.1264(7) 0.7249(6) 0.3913(4) 0.109(4) Uani 1 1 d DU . .
H26A H 0.1954 0.7665 0.3800 0.130 Uiso 1 1 calc R . .
C27 C 0.0742(6) 0.7718(6) 0.4108(4) 0.091(3) Uani 1 1 d DU . .
C28 C -0.0196(6) 0.7113(6) 0.4352(4) 0.079(3) Uani 1 1 d DU . .
H28A H -0.0470 0.7433 0.4552 0.095 Uiso 1 1 calc R . .
C29 C -0.0719(7) 0.6033(6) 0.4297(4) 0.100(4) Uani 1 1 d DU . .
H29A H -0.1412 0.5628 0.4409 0.121 Uiso 1 1 calc R . .
C30 C 0.1206(7) 0.8916(7) 0.4075(4) 0.074(3) Uani 1 1 d DU . .
H30A H 0.1236 0.9120 0.3740 0.089 Uiso 1 1 calc R . .
H30B H 0.0750 0.9116 0.4245 0.089 Uiso 1 1 calc R . .
Cl1 Cl -0.4610(3) 0.2956(3) 0.3197(3) 0.0819(14) Uani 0.50 1 d PDU . .
C31 C -0.3333 0.3333 0.3355(5) 0.034(5) Uani 0.75 3 d SPDU . .
B2 B -0.3333 0.3333 0.5021(3) 0.081(7) Uani 1 3 d SDU . .
F3 F -0.2855(5) 0.2768(5) 0.5151(3) 0.143(3) Uani 1 1 d DU . .
F4 F -0.3333 0.3333 0.4529(3) 0.121(5) Uani 1 3 d SDU . .
C32 C 0.0000 0.0000 0.2950(6) 0.065(7) Uani 0.75 3 d SPD . .
O2W O -0.2737(16) 0.0188(16) 0.3091(10) 0.101(8) Uiso 0.33 1 d P . .
Cl2 Cl -0.0727(4) 0.0589(4) 0.3141(2) 0.0899(19) Uani 0.50 1 d PD . .
O1W O -0.3435(12) -0.5843(14) -0.0182(7) 0.111(6) Uiso 0.50 1 d PU A 1
F5 F 0.0347(10) 1.1047(5) 0.6485(4) 0.094(4) Uiso 0.50 1 d PDU B 2
B3 B 0.0000 1.0000 0.6387(3) 0.072(9) Uiso 0.50 3 d SPDU . 2
F6 F 0.0000 1.0000 0.5897(4) 0.137(9) Uiso 0.50 3 d SPDU C 2
B3' B 0.0000 1.0000 0.6345(3) 0.072(9) Uiso 0.50 3 d SPDU . 3
F6' F 0.0000 1.0000 0.6835(4) 0.145(9) Uiso 0.50 3 d SPDU D 3
F5' F 0.0260(10) 1.0998(6) 0.6203(6) 0.113(5) Uiso 0.50 1 d PDU E 3
O5W O -0.448(4) -0.699(4) -0.0544(19) 0.119(13) Uiso 0.17 1 d PU F 3
Cl3 Cl -0.3622(8) 0.4228(8) 0.6317(5) 0.132(4) Uiso 0.33 1 d PDU . .
C33 C -0.3333 0.3333 0.6579(10) 0.18(2) Uiso 0.50 3 d SPDU . .
B1 B 0.3333 0.6667 0.3049(3) 0.084(6) Uani 1 3 d SDU . .
F1 F 0.4244(3) 0.6736(4) 0.3192(3) 0.0872(17) Uani 1 1 d D . .
F2 F 0.3333 0.6667 0.2560(2) 0.068(3) Uani 1 3 d SD . .
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0061 0.0033 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0106 0.0060 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Ag Ag -0.8971 1.1015 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
B B 0.0013 0.0007 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
F F 0.0171 0.0103 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
C1 Ag1 C16 176.0(2) . .
C1 N1 C15 120.7(6) . 3_565
C1 N1 C2 109.3(5) . .
C15 N1 C2 126.8(7) 3_565 .
C8 N2 C1 124.1(6) . .
C8 N2 C7 119.0(7) . .
C1 N2 C7 109.2(5) . .
C30 N3 C16 116.5(6) 2_665 .
C30 N3 C17 129.7(7) 2_665 .
C16 N3 C17 106.2(5) . .
C16 N4 C22 109.5(5) . .
C16 N4 C23 127.8(6) . .
C22 N4 C23 122.2(6) . .
N1 C1 N2 106.4(5) . .
N1 C1 Ag1 130.1(4) . .
N2 C1 Ag1 121.6(4) . .
N1 C2 C7 103.4(5) . .
N1 C2 C3 117.2(6) . .
C7 C2 C3 113.8(7) . .
C4 C3 C2 113.2(7) . .
C5 C4 C3 110.2(8) . .
C4 C5 C6 120.1(8) . .
C7 C6 C5 109.4(6) . .
N2 C7 C6 130.3(6) . .
N2 C7 C2 102.2(5) . .
C6 C7 C2 107.9(7) . .
N2 C8 C9 112.5(7) . .
C14 C9 C10 122.4(6) . .
C14 C9 C8 115.4(7) . .
C10 C9 C8 121.4(6) . .
C11 C10 C9 119.1(7) . .
C10 C11 C12 121.0(7) . .
C11 C12 C13 117.5(6) . .
C11 C12 C15 121.6(7) . .
C13 C12 C15 120.9(6) . .
C14 C13 C12 120.4(6) . .
C9 C14 C13 118.0(7) . .
N1 C15 C12 115.2(8) 2_665 .
N4 C16 N3 106.0(5) . .
N4 C16 Ag1 120.3(5) . .
N3 C16 Ag1 129.6(5) . .
N3 C17 C22 100.9(5) . .
N3 C17 C18 119.3(7) . .
C22 C17 C18 113.9(6) . .
C17 C18 C19 105.4(7) . .
C20 C19 C18 106.5(8) . .
C19 C20 C21 122.1(9) . .
C20 C21 C22 108.5(7) . .
N4 C22 C17 102.2(5) . .
N4 C22 C21 122.8(7) . .
C17 C22 C21 107.1(7) . .
N4 C23 C24 120.6(7) . .
C29 C24 C25 118.5(7) . .
C29 C24 C23 121.0(7) . .
C25 C24 C23 120.5(7) . .
C26 C25 C24 120.1(8) . .
C27 C26 C25 120.1(7) . .
C26 C27 C28 119.9(8) . .
C26 C27 C30 120.7(7) . .
C28 C27 C30 119.4(8) . .
C29 C28 C27 118.8(8) . .
C28 C29 C24 120.9(8) . .
N3 C30 C27 110.6(8) 3_565 .
Cl1 C31 Cl1 113.7(4) 2_565 3_455
Cl1 C31 Cl1 113.7(4) 2_565 .
Cl1 C31 Cl1 113.7(4) 3_455 .
F4 B2 F3 105.4(5) . .
F4 B2 F3 105.4(5) . 2_565
F3 B2 F3 113.2(4) . 2_565
F4 B2 F3 105.4(5) . 3_455
F3 B2 F3 113.2(4) . 3_455
F3 B2 F3 113.2(4) 2_565 3_455
Cl2 C32 Cl2 111.2(5) . 3
Cl2 C32 Cl2 111.2(5) . 2
Cl2 C32 Cl2 111.2(5) 3 2
F6 B3 F5 101.4(6) . .
F6 B3 F5 101.4(6) . 2_675
F5 B3 F5 116.2(4) . 2_675
F6 B3 F5 101.4(6) . 3_465
F5 B3 F5 116.2(4) . 3_465
F5 B3 F5 116.2(4) 2_675 3_465
F6' B3' F5' 106.8(8) . 2_675
F6' B3' F5' 106.8(7) . 3_465
F5' B3' F5' 112.0(7) 2_675 3_465
F6' B3' F5' 106.8(8) . .
F5' B3' F5' 112.0(7) 2_675 .
F5' B3' F5' 112.0(7) 3_465 .
Cl3 C33 Cl3 103.2(12) 3_455 2_565
Cl3 C33 Cl3 103.2(12) 3_455 .
Cl3 C33 Cl3 103.2(12) 2_565 .
F1 B1 F1 111.6(4) 2_665 3_565
F1 B1 F1 111.6(4) 2_665 .
F1 B1 F1 111.6(4) 3_565 .
F1 B1 F2 107.2(4) 2_665 .
F1 B1 F2 107.2(4) 3_565 .
F1 B1 F2 107.2(4) . .
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Ag1 C1 2.078(6) .
Ag1 C16 2.118(7) .
N1 C1 1.392(6) .
N1 C15 1.420(10) 3_565
N1 C2 1.422(6) .
N2 C8 1.385(10) .
N2 C1 1.396(6) .
N2 C7 1.406(6) .
N3 C30 1.400(10) 2_665
N3 C16 1.399(7) .
N3 C17 1.421(6) .
N4 C16 1.395(7) .
N4 C22 1.414(6) .
N4 C23 1.437(10) .
C2 C7 1.494(8) .
C2 C3 1.519(8) .
C3 C4 1.510(8) .
C4 C5 1.490(9) .
C5 C6 1.552(8) .
C6 C7 1.488(7) .
C8 C9 1.551(9) .
C9 C14 1.341(8) .
C9 C10 1.373(8) .
C10 C11 1.367(7) .
C11 C12 1.372(7) .
C12 C13 1.417(8) .
C12 C15 1.574(10) .
C13 C14 1.394(7) .
C15 N1 1.420(10) 2_665
C17 C22 1.501(8) .
C17 C18 1.516(8) .
C18 C19 1.538(8) .
C19 C20 1.496(9) .
C20 C21 1.516(8) .
C21 C22 1.526(8) .
C23 C24 1.559(9) .
C24 C29 1.379(8) .
C24 C25 1.388(8) .
C25 C26 1.373(8) .
C26 C27 1.361(8) .
C27 C28 1.376(8) .
C27 C30 1.524(10) .
C28 C29 1.369(8) .
C30 N3 1.400(10) 3_565
Cl1 C31 1.709(6) .
C31 Cl1 1.709(6) 2_565
C31 Cl1 1.709(6) 3_455
B2 F4 1.363(7) .
B2 F3 1.364(6) .
B2 F3 1.364(6) 2_565
B2 F3 1.364(6) 3_455
C32 Cl2 1.742(7) .
C32 Cl2 1.742(7) 3
C32 Cl2 1.742(7) 2
F5 B3 1.370(6) .
B3 F6 1.360(8) .
B3 F5 1.370(6) 2_675
B3 F5 1.370(6) 3_465
B3' F6' 1.361(8) .
B3' F5' 1.362(7) 2_675
B3' F5' 1.362(7) 3_465
B3' F5' 1.362(7) .
Cl3 C33 1.716(9) .
C33 Cl3 1.716(9) 3_455
C33 Cl3 1.716(9) 2_565
B1 F1 1.337(4) 2_665
B1 F1 1.337(4) 3_565
B1 F1 1.337(4) .
B1 F2 1.358(7) .
