#------------------------------------------------------------------------------
#$Date: 2016-02-20 05:06:23 +0200 (Sat, 20 Feb 2016) $
#$Revision: 176774 $
#$URL: svn://www.crystallography.net/cod/cif/2/20/20/2202020.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_2202020
loop_
_publ_author_name
'Shu-Yan Zhang'
'Zhan Shi'
Long-Guan,Zhu
'Ru-Ren Xu'
'Wen-Qin Pang'
_publ_section_title
;Di-μ-acetato-κ³O,O':O'-di-μ-trichloroacetato-κ²O:O'-bis[aqua(trichloroacetato)(1,10-phenanthroline-κ²N,N')praseodymium(III)]
 dimethylformamide disolvate
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              m142
_journal_page_last               m144
_journal_paper_doi               10.1107/S1600536803004744
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac
'[Pr2 (C4 Cl6 O4)4 (C2 H3 O2)2 (C12 H8 N2)2 (H2 O)2], 2C3 H7 N O'
_chemical_formula_moiety         'C36 H26 Cl12 N4 O14 Pr2, 2C3 H7 N O'
_chemical_formula_sum            'C42 H40 Cl12 N6 O16 Pr2'
_chemical_formula_weight         1592.02
_chemical_name_systematic        ?
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                113.89(3)
_cell_angle_beta                 102.18(2)
_cell_angle_gamma                102.786(18)
_cell_formula_units_Z            1
_cell_length_a                   10.351(3)
_cell_length_b                   12.475(3)
_cell_length_c                   13.424(4)
_cell_measurement_reflns_used    7133
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      23.3
_cell_measurement_theta_min      1.8
_cell_volume                     1455.1(9)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        'SAINT (Bruker, 1997)'
_computing_molecular_graphics    'SHELXP97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXTL (Bruker, 1997)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       'φ and ω'
_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  0.0138
_diffrn_reflns_av_sigmaI/netI    0.0200
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            7133
_diffrn_reflns_theta_full        23.29
_diffrn_reflns_theta_max         23.29
_diffrn_reflns_theta_min         1.76
_diffrn_standards_decay_%        'not measured'
_exptl_absorpt_coefficient_mu    2.274
_exptl_absorpt_correction_T_max  0.6591
_exptl_absorpt_correction_T_min  0.5487
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.817
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             784
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.073
_refine_diff_density_min         -0.760
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     360
_refine_ls_number_reflns         4163
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0341
_refine_ls_R_factor_gt           0.0310
_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/[σ²(Fo²)+(0.0368P)²+3.6925P] where P = (Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0762
_refine_ls_wR_factor_ref         0.0783
_reflns_number_gt                3874
_reflns_number_total             4163
_reflns_threshold_expression     I>2σ(I)
_cod_data_source_file            lh6037.cif
_cod_data_source_block           I
_cod_original_cell_volume        1455.0(7)
_cod_database_code               2202020
_cod_database_fobs_code          2202020
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, -z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
_atom_site_type_symbol
Pr1 0.12942(2) 0.66798(2) 0.027032(19) 0.03210(10) Uani d . 1 . . Pr
Cl1 -0.0356(3) 0.2865(3) -0.42151(19) 0.1231(9) Uani d . 1 . . Cl
Cl2 -0.3201(2) 0.2697(2) -0.44801(14) 0.1128(9) Uani d . 1 . . Cl
Cl3 -0.1202(2) 0.48897(17) -0.41123(14) 0.0922(6) Uani d . 1 . . Cl
Cl4 0.1017(3) 1.19173(17) 0.33217(17) 0.1010(7) Uani d . 1 . . Cl
Cl5 0.07827(19) 1.0018(2) 0.39825(15) 0.0857(5) Uani d . 1 . . Cl
Cl6 0.34111(15) 1.11792(18) 0.38636(14) 0.0818(5) Uani d . 1 . . Cl
O1 -0.0148(4) 0.7591(4) -0.0675(3) 0.0552(9) Uani d D 1 . . O
H1A -0.005(7) 0.838(3) -0.029(5) 0.09(2) Uiso d D 1 . . H
H1B -0.096(5) 0.713(6) -0.125(5) 0.11(3) Uiso d D 1 . . H
O2 -0.0020(3) 0.5184(3) -0.1826(3) 0.0440(8) Uani d . 1 . . O
O3 -0.1723(3) 0.3525(3) -0.2084(3) 0.0434(8) Uani d . 1 . . O
O4 0.1384(4) 0.8664(3) 0.1796(3) 0.0596(10) Uani d . 1 . . O
O5 0.0645(6) 0.9912(4) 0.1196(4) 0.0813(14) Uani d . 1 . . O
O6 0.2932(4) 0.5459(3) -0.0231(4) 0.0570(10) Uani d . 1 . . O
O7 0.0981(3) 0.4342(3) -0.0239(3) 0.0405(7) Uani d . 1 . . O
O8 -0.2843(7) 0.6175(8) -0.1992(8) 0.161(4) Uani d . 1 . . O
N1 0.3960(4) 0.8176(4) 0.1469(3) 0.0453(10) Uani d . 1 . . N
N2 0.2786(4) 0.7552(4) -0.0785(3) 0.0446(10) Uani d . 1 . . N
N3 -0.5093(7) 0.5029(7) -0.2962(6) 0.0916(19) Uani d . 1 . . N
C1 0.4523(6) 0.8537(5) 0.2585(5) 0.0610(15) Uani d . 1 . . C
H1 0.3943 0.8327 0.2969 0.080 Uiso calc . 1 . . H
C2 0.5947(7) 0.9216(6) 0.3208(6) 0.0747(19) Uani d . 1 . . C
H2 0.6302 0.9448 0.3990 0.080 Uiso calc . 1 . . H
C3 0.6803(6) 0.9534(6) 0.2672(7) 0.076(2) Uani d . 1 . . C
H3 0.7753 0.9993 0.3086 0.080 Uiso calc . 1 . . H
C4 0.6272(5) 0.9178(5) 0.1497(6) 0.0581(15) Uani d . 1 . . C
C5 0.4816(5) 0.8495(4) 0.0918(5) 0.0445(12) Uani d . 1 . . C
C6 0.4199(5) 0.8152(4) -0.0277(5) 0.0445(12) Uani d . 1 . . C
C7 0.5061(6) 0.8476(5) -0.0865(6) 0.0600(15) Uani d . 1 . . C
C8 0.4413(9) 0.8156(6) -0.2008(6) 0.079(2) Uani d . 1 . . C
H8 0.4949 0.8347 -0.2429 0.080 Uiso calc . 1 . . H
C9 0.2999(9) 0.7564(6) -0.2521(5) 0.077(2) Uani d . 1 . . C
H9 0.2561 0.7356 -0.3287 0.080 Uiso calc . 1 . . H
C10 0.2213(7) 0.7272(5) -0.1879(5) 0.0605(15) Uani d . 1 . . C
H10 0.1246 0.6863 -0.2236 0.080 Uiso calc . 1 . . H
C11 0.7110(6) 0.9477(6) 0.0860(8) 0.076(2) Uani d . 1 . . C
H11 0.8070 0.9917 0.1231 0.080 Uiso calc . 1 . . H
C12 0.6542(7) 0.9139(6) -0.0243(8) 0.077(2) Uani d . 1 . . C
H12 0.7119 0.9336 -0.0634 0.080 Uiso calc . 1 . . H
C13 -0.1031(5) 0.4190(4) -0.2397(4) 0.0371(11) Uani d . 1 . . C
C14 -0.1444(6) 0.3682(5) -0.3737(4) 0.0490(13) Uani d . 1 . . C
C15 0.1151(5) 0.9631(5) 0.1928(4) 0.0436(12) Uani d . 1 . . C
C16 0.1561(5) 1.0641(5) 0.3206(4) 0.0471(12) Uani d . 1 . . C
C17 0.2139(5) 0.4431(5) -0.0430(4) 0.0449(12) Uani d . 1 . . C
C18 0.2490(8) 0.3271(6) -0.0920(7) 0.082(2) Uani d . 1 . . C
H18A 0.1754 0.2582 -0.1009 0.080 Uiso calc . 1 . . H
H18B 0.3362 0.3375 -0.0405 0.080 Uiso calc . 1 . . H
H18C 0.2578 0.3109 -0.1660 0.080 Uiso calc . 1 . . H
C19 -0.3834(15) 0.5827(12) -0.2552(13) 0.169(6) Uani d . 1 . . C
H19 -0.3847 0.6285 -0.2952 0.080 Uiso calc . 1 . . H
C20 -0.602(3) 0.4880(16) -0.3831(17) 0.41(2) Uani d . 1 . . C
H20A -0.6887 0.4264 -0.3986 0.080 Uiso calc . 1 . . H
H20B -0.5720 0.4606 -0.4492 0.080 Uiso calc . 1 . . H
H20C -0.6172 0.5657 -0.3678 0.080 Uiso calc . 1 . . H
C21 -0.540(4) 0.444(3) -0.244(3) 0.384(19) Uani d . 1 . . C
H21A -0.6357 0.3867 -0.2842 0.080 Uiso calc . 1 . . H
H21B -0.5316 0.5007 -0.1667 0.080 Uiso calc . 1 . . H
H21C -0.4781 0.3974 -0.2404 0.080 Uiso calc . 1 . . H
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'
Cl Cl 0.1484 0.1585 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Pr Pr -0.2180 2.8214 '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_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle
O7 Pr1 O4 2_565 . 90.27(13)
O7 Pr1 O1 2_565 . 80.29(12)
O4 Pr1 O1 . . 72.29(13)
O7 Pr1 O2 2_565 . 76.03(11)
O4 Pr1 O2 . . 140.05(12)
O1 Pr1 O2 . . 68.52(12)
O7 Pr1 O3 2_565 2_565 74.23(11)
O4 Pr1 O3 . 2_565 74.11(12)
O1 Pr1 O3 . 2_565 137.28(13)
O2 Pr1 O3 . 2_565 134.02(10)
O7 Pr1 O6 2_565 . 119.84(11)
O4 Pr1 O6 . . 138.47(13)
O1 Pr1 O6 . . 136.05(13)
O2 Pr1 O6 . . 78.71(13)
O3 Pr1 O6 2_565 . 86.63(12)
O7 Pr1 O7 2_565 . 70.10(12)
O4 Pr1 O7 . . 142.68(12)
O1 Pr1 O7 . . 131.09(12)
O2 Pr1 O7 . . 67.10(10)
O3 Pr1 O7 2_565 . 70.18(10)
O6 Pr1 O7 . . 49.79(10)
O7 Pr1 N2 2_565 . 147.63(12)
O4 Pr1 N2 . . 99.32(13)
O1 Pr1 N2 . . 73.49(14)
O2 Pr1 N2 . . 76.90(11)
O3 Pr1 N2 2_565 . 138.13(12)
O6 Pr1 N2 . . 71.12(12)
O7 Pr1 N2 . . 114.36(11)
O7 Pr1 N1 2_565 . 149.46(12)
O4 Pr1 N1 . . 70.02(13)
O1 Pr1 N1 . . 113.46(13)
O2 Pr1 N1 . . 133.86(12)
O3 Pr1 N1 2_565 . 77.94(12)
O6 Pr1 N1 . . 70.14(13)
O7 Pr1 N1 . . 111.70(11)
N2 Pr1 N1 . . 61.44(13)
O7 Pr1 C17 2_565 . 95.25(13)
O4 Pr1 C17 . . 149.68(13)
O1 Pr1 C17 . . 138.03(13)
O2 Pr1 C17 . . 69.91(13)
O3 Pr1 C17 2_565 . 78.77(13)
O6 Pr1 C17 . . 24.59(12)
O7 Pr1 C17 . . 25.27(12)
N2 Pr1 C17 . . 91.83(13)
N1 Pr1 C17 . . 91.42(14)
O7 Pr1 Pr1 2_565 2_565 36.94(8)
O4 Pr1 Pr1 . 2_565 120.73(10)
O1 Pr1 Pr1 . 2_565 108.78(10)
O2 Pr1 Pr1 . 2_565 67.10(8)
O3 Pr1 Pr1 2_565 2_565 67.99(8)
O6 Pr1 Pr1 . 2_565 82.92(8)
O7 Pr1 Pr1 . 2_565 33.16(7)
N2 Pr1 Pr1 . 2_565 139.02(9)
N1 Pr1 Pr1 . 2_565 137.51(9)
C17 Pr1 Pr1 . 2_565 58.35(10)
Pr1 O1 H1A . . 119(4)
Pr1 O1 H1B . . 123(5)
H1A O1 H1B . . 114(7)
C13 O2 Pr1 . . 136.7(3)
C13 O3 Pr1 . 2_565 134.0(3)
C15 O4 Pr1 . . 141.1(3)
C17 O6 Pr1 . . 97.5(3)
C17 O7 Pr1 . 2_565 157.1(3)
C17 O7 Pr1 . . 92.2(3)
Pr1 O7 Pr1 2_565 . 109.90(12)
C1 N1 C5 . . 118.1(4)
C1 N1 Pr1 . . 121.6(3)
C5 N1 Pr1 . . 120.1(3)
C10 N2 C6 . . 117.8(4)
C10 N2 Pr1 . . 120.8(3)
C6 N2 Pr1 . . 120.8(3)
C21 N3 C20 . . 119(2)
C21 N3 C19 . . 118.1(19)
C20 N3 C19 . . 122.3(18)
N1 C1 C2 . . 122.9(6)
N1 C1 H1 . . 118.5
C2 C1 H1 . . 118.5
C3 C2 C1 . . 119.6(6)
C3 C2 H2 . . 120.2
C1 C2 H2 . . 120.2
C2 C3 C4 . . 120.2(5)
C2 C3 H3 . . 119.9
C4 C3 H3 . . 119.9
C3 C4 C5 . . 117.3(6)
C3 C4 C11 . . 123.8(6)
C5 C4 C11 . . 118.9(6)
N1 C5 C4 . . 122.0(5)
N1 C5 C6 . . 118.2(4)
C4 C5 C6 . . 119.8(5)
N2 C6 C7 . . 122.7(5)
N2 C6 C5 . . 118.0(4)
C7 C6 C5 . . 119.3(5)
C8 C7 C6 . . 117.2(6)
C8 C7 C12 . . 124.2(6)
C6 C7 C12 . . 118.6(6)
C9 C8 C7 . . 120.4(5)
C9 C8 H8 . . 119.8
C7 C8 H8 . . 119.8
C8 C9 C10 . . 119.0(6)
C8 C9 H9 . . 120.5
C10 C9 H9 . . 120.5
N2 C10 C9 . . 122.8(6)
N2 C10 H10 . . 118.6
C9 C10 H10 . . 118.6
C12 C11 C4 . . 121.0(6)
C12 C11 H11 . . 119.5
C4 C11 H11 . . 119.5
C11 C12 C7 . . 122.4(6)
C11 C12 H12 . . 118.8
C7 C12 H12 . . 118.8
O3 C13 O2 . . 130.6(4)
O3 C13 C14 . . 115.6(4)
O2 C13 C14 . . 113.7(4)
C13 C14 Cl1 . . 108.1(4)
C13 C14 Cl2 . . 112.4(3)
Cl1 C14 Cl2 . . 109.2(3)
C13 C14 Cl3 . . 112.2(3)
Cl1 C14 Cl3 . . 107.4(3)
Cl2 C14 Cl3 . . 107.3(3)
O5 C15 O4 . . 129.3(5)
O5 C15 C16 . . 115.4(5)
O4 C15 C16 . . 115.3(5)
C15 C16 Cl5 . . 110.9(4)
C15 C16 Cl4 . . 112.4(4)
Cl5 C16 Cl4 . . 107.1(3)
C15 C16 Cl6 . . 108.8(3)
Cl5 C16 Cl6 . . 108.3(3)
Cl4 C16 Cl6 . . 109.3(3)
O6 C17 O7 . . 120.2(5)
O6 C17 C18 . . 121.9(5)
O7 C17 C18 . . 117.8(5)
O6 C17 Pr1 . . 57.9(3)
O7 C17 Pr1 . . 62.5(2)
C18 C17 Pr1 . . 173.5(4)
C17 C18 H18A . . 109.5
C17 C18 H18B . . 109.5
H18A C18 H18B . . 109.5
C17 C18 H18C . . 109.5
H18A C18 H18C . . 109.5
H18B C18 H18C . . 109.5
O8 C19 N3 . . 147.9(19)
O8 C19 H19 . . 106.0
N3 C19 H19 . . 106.0
N3 C20 H20A . . 109.5
N3 C20 H20B . . 109.5
H20A C20 H20B . . 109.5
N3 C20 H20C . . 109.5
H20A C20 H20C . . 109.5
H20B C20 H20C . . 109.5
N3 C21 H21A . . 109.5
N3 C21 H21B . . 109.5
H21A C21 H21B . . 109.5
N3 C21 H21C . . 109.5
H21A C21 H21C . . 109.5
H21B C21 H21C . . 109.5
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
Pr1 O7 2_565 2.399(3) y
Pr1 O4 . 2.458(4) y
Pr1 O1 . 2.500(4) y
Pr1 O2 . 2.502(3) y
Pr1 O3 2_565 2.507(3) y
Pr1 O6 . 2.538(4) y
Pr1 O7 . 2.636(3) y
Pr1 N2 . 2.646(4) y
Pr1 N1 . 2.665(4) y
Pr1 C17 . 2.969(5) ?
Pr1 Pr1 2_565 4.1249(13) ?
Cl1 C14 . 1.732(6) ?
Cl2 C14 . 1.751(5) ?
Cl3 C14 . 1.757(5) ?
Cl4 C16 . 1.763(6) ?
Cl5 C16 . 1.753(5) ?
Cl6 C16 . 1.770(5) ?
O1 H1A . 0.88(2) ?
O1 H1B . 0.89(2) ?
O2 C13 . 1.240(5) ?
O3 C13 . 1.235(5) ?
O3 Pr1 2_565 2.507(3) ?
O4 C15 . 1.233(6) ?
O5 C15 . 1.227(6) ?
O6 C17 . 1.246(6) ?
O7 C17 . 1.268(6) ?
O7 Pr1 2_565 2.399(3) ?
O8 C19 . 1.009(13) ?
N1 C1 . 1.324(7) ?
N1 C5 . 1.360(6) ?
N2 C10 . 1.325(7) ?
N2 C6 . 1.358(6) ?
N3 C21 . 1.248(19) ?
N3 C20 . 1.263(17) ?
N3 C19 . 1.293(14) ?
C1 C2 . 1.394(8) ?
C1 H1 . 0.9300 ?
C2 C3 . 1.344(10) ?
C2 H2 . 0.9300 ?
C3 C4 . 1.396(10) ?
C3 H3 . 0.9300 ?
C4 C5 . 1.415(7) ?
C4 C11 . 1.432(9) ?
C5 C6 . 1.434(7) ?
C6 C7 . 1.407(7) ?
C7 C8 . 1.384(10) ?
C7 C12 . 1.439(10) ?
C8 C9 . 1.359(10) ?
C8 H8 . 0.9300 ?
C9 C10 . 1.399(8) ?
C9 H9 . 0.9300 ?
C10 H10 . 0.9300 ?
C11 C12 . 1.316(10) ?
C11 H11 . 0.9300 ?
C12 H12 . 0.9300 ?
C13 C14 . 1.566(6) ?
C15 C16 . 1.554(7) ?
C17 C18 . 1.490(8) ?
C18 H18A . 0.9600 ?
C18 H18B . 0.9600 ?
C18 H18C . 0.9600 ?
C19 H19 . 0.9300 ?
C20 H20A . 0.9600 ?
C20 H20B . 0.9600 ?
C20 H20C . 0.9600 ?
C21 H21A . 0.9600 ?
C21 H21B . 0.9600 ?
C21 H21C . 0.9600 ?
loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
O1 H1A O5 0.88(2) 1.96(4) 2.748(6) 149(6)
O1 H1B O8 0.89(2) 1.84(4) 2.690(8) 159(8)
