#------------------------------------------------------------------------------
#$Date: 2023-06-05 07:23:35 +0300 (Mon, 05 Jun 2023) $
#$Revision: 284259 $
#$URL: file:///home/coder/svn-repositories/cod/cif/7/24/66/7246612.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_7246612
loop_
_publ_author_name
'Zhang, Kena'
'Wang, Qiushuang'
'Gong, Yuanyuan'
'Wang, Nairong'
'Li, Xia'
_publ_section_title
;
 Four Zn(ii)-5-(2-carboxy-phenoxy)-1,3-benzenedicarboxylate coordination
 polymers induced by different N-ligands: synthesis, structure, and
 fluorescence detection for BPA and IMH
;
_journal_issue                   20
_journal_name_full               CrystEngComm
_journal_page_first              3033
_journal_page_last               3043
_journal_paper_doi               10.1039/D3CE00179B
_journal_volume                  25
_journal_year                    2023
_chemical_formula_sum            'C20 H12 N O8 Zn2'
_chemical_formula_weight         525.05
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_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
_audit_update_record
;
2022-10-17 deposited with the CCDC.	2023-04-12 downloaded from the CCDC.
;
_cell_angle_alpha                97.3950(10)
_cell_angle_beta                 92.4190(10)
_cell_angle_gamma                103.8140(10)
_cell_formula_units_Z            2
_cell_length_a                   9.3209(4)
_cell_length_b                   9.6054(4)
_cell_length_c                   10.9253(5)
_cell_measurement_reflns_used    9961
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.561
_cell_measurement_theta_min      3.049
_cell_volume                     939.25(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku Saturn724 CCD'
_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  0.1280
_diffrn_reflns_av_sigmaI/netI    0.0613
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            16603
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         3.05
_exptl_absorpt_coefficient_mu    2.606
_exptl_absorpt_correction_T_max  0.7715
_exptl_absorpt_correction_T_min  0.3829
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS; Bruker, 2000'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.856
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             526
_exptl_crystal_size_max          0.456
_exptl_crystal_size_mid          0.214
_exptl_crystal_size_min          0.105
_refine_diff_density_max         0.614
_refine_diff_density_min         -0.881
_refine_diff_density_rms         0.121
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     284
_refine_ls_number_reflns         3306
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0402
_refine_ls_R_factor_gt           0.0372
_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/[σ²(Fo²)+(0.0556P)²+0.5685P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0982
_refine_ls_wR_factor_ref         0.1010
_reflns_number_gt                3050
_reflns_number_total             3306
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            d3ce00179b2.cif
_cod_data_source_block           111_CCDC1
_cod_depositor_comments
'Adding full bibliography for 7246611--7246614.cif.'
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7246612
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-x, -y, -z'
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
Zn1 Zn 0.99080(3) 0.47882(3) 0.35114(3) 0.01749(13) Uani 1 1 d . . .
Zn2 Zn 0.69135(3) 0.54598(3) 0.47020(3) 0.01762(13) Uani 1 1 d . . .
O1 O 0.6488(2) 0.6027(3) 0.3113(2) 0.0336(5) Uani 1 1 d . . .
O2 O 0.8343(3) 0.5261(3) 0.2265(2) 0.0358(6) Uani 1 1 d . . .
O3 O 0.6863(2) 0.8717(2) 0.2281(2) 0.0270(5) Uani 1 1 d . . .
O4 O 0.1621(2) 0.6257(2) 0.3106(2) 0.0276(5) Uani 1 1 d . . .
O5 O 0.0802(3) 0.8041(2) 0.4138(3) 0.0484(7) Uani 1 1 d . . .
O6 O 0.6193(2) 1.3376(2) 0.4542(2) 0.0276(5) Uani 1 1 d . . .
O7 O 0.3765(2) 1.3125(2) 0.4198(2) 0.0279(5) Uani 1 1 d . . .
O8 O 1.0956(2) 0.4164(2) 0.50043(17) 0.0183(4) Uani 1 1 d D . .
N1 N 0.9795(3) 0.2921(3) 0.2282(2) 0.0231(5) Uani 1 1 d . . .
C1 C 0.7312(3) 0.5883(3) 0.2248(3) 0.0227(6) Uani 1 1 d . . .
C2 C 0.6969(3) 0.6474(3) 0.1095(3) 0.0217(6) Uani 1 1 d . . .
C3 C 0.6931(4) 0.5662(4) -0.0061(3) 0.0320(7) Uani 1 1 d . . .
H3 H 0.7195 0.4782 -0.0118 0.038 Uiso 1 1 calc R . .
C4 C 0.6512(4) 0.6140(4) -0.1118(3) 0.0411(8) Uani 1 1 d . . .
H4 H 0.6485 0.5586 -0.1886 0.049 Uiso 1 1 calc R . .
C5 C 0.6132(5) 0.7442(5) -0.1035(3) 0.0496(10) Uani 1 1 d . . .
H5 H 0.5822 0.7756 -0.1748 0.060 Uiso 1 1 calc R . .
C6 C 0.6206(4) 0.8293(4) 0.0104(3) 0.0430(9) Uani 1 1 d . . .
H6 H 0.5978 0.9189 0.0154 0.052 Uiso 1 1 calc R . .
C7 C 0.6621(3) 0.7800(3) 0.1158(3) 0.0231(6) Uani 1 1 d . . .
C8 C 0.5650(3) 0.9145(3) 0.2748(3) 0.0206(6) Uani 1 1 d . . .
C9 C 0.4307(3) 0.8163(3) 0.2802(3) 0.0226(6) Uani 1 1 d . . .
H9 H 0.4175 0.7193 0.2477 0.027 Uiso 1 1 calc R . .
C10 C 0.3157(3) 0.8641(3) 0.3348(3) 0.0218(6) Uani 1 1 d . . .
C15 C 0.1740(3) 0.7574(3) 0.3545(3) 0.0259(7) Uani 1 1 d . . .
C14 C 0.4907(3) 1.2641(3) 0.4211(2) 0.0186(6) Uani 1 1 d . . .
C12 C 0.4704(3) 1.1068(3) 0.3754(2) 0.0186(6) Uani 1 1 d . . .
C13 C 0.5869(3) 1.0585(3) 0.3237(3) 0.0213(6) Uani 1 1 d . . .
H13 H 0.6787 1.1227 0.3221 0.026 Uiso 1 1 calc R . .
C11 C 0.3347(3) 1.0096(3) 0.3811(3) 0.0210(6) Uani 1 1 d . . .
H11 H 0.2568 1.0418 0.4156 0.025 Uiso 1 1 calc R . .
C16 C 1.0071(4) 0.1715(4) 0.2589(3) 0.0363(8) Uani 1 1 d . . .
H16 H 1.0221 0.1652 0.3424 0.044 Uiso 1 1 calc R . .
C17 C 1.0148(4) 0.0547(4) 0.1736(3) 0.0374(8) Uani 1 1 d . . .
H17 H 1.0331 -0.0279 0.2004 0.045 Uiso 1 1 calc R . .
C18 C 0.9952(3) 0.0605(3) 0.0482(3) 0.0259(6) Uani 1 1 d . . .
C19 C 0.9664(5) 0.1866(4) 0.0169(3) 0.0421(9) Uani 1 1 d . . .
H19 H 0.9513 0.1964 -0.0659 0.050 Uiso 1 1 calc R . .
C20 C 0.9600(5) 0.2974(4) 0.1079(3) 0.0425(9) Uani 1 1 d . . .
H20 H 0.9408 0.3811 0.0839 0.051 Uiso 1 1 calc R . .
H8 H 1.046(5) 0.335(3) 0.511(5) 0.084(18) Uiso 1 1 d D . .
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'
Zn Zn 0.2839 1.4301 '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
_geom_angle_publ_flag
O4 Zn1 N1 106.39(9) 1_655 . ?
O4 Zn1 O8 104.90(8) 1_655 2_766 ?
N1 Zn1 O8 148.70(9) . 2_766 ?
O4 Zn1 O8 97.39(8) 1_655 . ?
N1 Zn1 O8 96.33(9) . . ?
O8 Zn1 O8 79.36(8) 2_766 . ?
O4 Zn1 O2 95.92(9) 1_655 . ?
N1 Zn1 O2 87.01(9) . . ?
O8 Zn1 O2 90.04(8) 2_766 . ?
O8 Zn1 O2 164.74(9) . . ?
O6 Zn2 O7 126.34(10) 1_545 2_676 ?
O6 Zn2 O8 105.34(8) 1_545 2_766 ?
O7 Zn2 O8 108.24(9) 2_676 2_766 ?
O6 Zn2 O1 107.20(10) 1_545 . ?
O7 Zn2 O1 100.62(9) 2_676 . ?
O8 Zn2 O1 108.06(9) 2_766 . ?
C1 O1 Zn2 120.13(18) . . ?
C1 O2 Zn1 141.2(2) . . ?
C8 O3 C7 117.1(2) . . ?
C15 O4 Zn1 118.25(18) . 1_455 ?
C14 O6 Zn2 127.39(18) . 1_565 ?
C14 O7 Zn2 133.8(2) . 2_676 ?
Zn2 O8 Zn1 109.71(9) 2_766 2_766 ?
Zn2 O8 Zn1 123.69(10) 2_766 . ?
Zn1 O8 Zn1 100.64(8) 2_766 . ?
Zn2 O8 H8 117(4) 2_766 . ?
Zn1 O8 H8 93(4) 2_766 . ?
Zn1 O8 H8 108(4) . . ?
C16 N1 C20 116.3(3) . . ?
C16 N1 Zn1 125.0(2) . . ?
C20 N1 Zn1 118.2(2) . . ?
O2 C1 O1 125.4(3) . . ?
O2 C1 C2 118.6(3) . . ?
O1 C1 C2 116.0(2) . . ?
C7 C2 C3 118.7(3) . . ?
C7 C2 C1 121.0(3) . . ?
C3 C2 C1 120.3(3) . . ?
C4 C3 C2 120.9(3) . . ?
C4 C3 H3 119.5 . . ?
C2 C3 H3 119.5 . . ?
C5 C4 C3 119.5(3) . . ?
C5 C4 H4 120.2 . . ?
C3 C4 H4 120.2 . . ?
C4 C5 C6 120.6(3) . . ?
C4 C5 H5 119.7 . . ?
C6 C5 H5 119.7 . . ?
C7 C6 C5 119.4(3) . . ?
C7 C6 H6 120.3 . . ?
C5 C6 H6 120.3 . . ?
C6 C7 C2 120.8(3) . . ?
C6 C7 O3 119.5(3) . . ?
C2 C7 O3 119.3(3) . . ?
C13 C8 C9 121.1(2) . . ?
C13 C8 O3 116.9(2) . . ?
C9 C8 O3 121.9(3) . . ?
C8 C9 C10 119.3(3) . . ?
C8 C9 H9 120.3 . . ?
C10 C9 H9 120.3 . . ?
C11 C10 C9 120.2(3) . . ?
C11 C10 C15 119.1(3) . . ?
C9 C10 C15 120.5(3) . . ?
O5 C15 O4 125.4(3) . . ?
O5 C15 C10 117.9(3) . . ?
O4 C15 C10 116.7(2) . . ?
O6 C14 O7 125.3(3) . . ?
O6 C14 C12 117.7(2) . . ?
O7 C14 C12 117.0(2) . . ?
C11 C12 C13 120.1(3) . . ?
C11 C12 C14 120.3(2) . . ?
C13 C12 C14 119.6(2) . . ?
C8 C13 C12 119.5(3) . . ?
C8 C13 H13 120.3 . . ?
C12 C13 H13 120.3 . . ?
C10 C11 C12 119.8(3) . . ?
C10 C11 H11 120.1 . . ?
C12 C11 H11 120.1 . . ?
N1 C16 C17 123.7(3) . . ?
N1 C16 H16 118.2 . . ?
C17 C16 H16 118.2 . . ?
C16 C17 C18 120.0(3) . . ?
C16 C17 H17 120.0 . . ?
C18 C17 H17 120.0 . . ?
C19 C18 C17 116.0(3) . . ?
C19 C18 C18 121.4(4) . 2_755 ?
C17 C18 C18 122.6(3) . 2_755 ?
C20 C19 C18 120.2(3) . . ?
C20 C19 H19 119.9 . . ?
C18 C19 H19 119.9 . . ?
N1 C20 C19 123.8(3) . . ?
N1 C20 H20 118.1 . . ?
C19 C20 H20 118.1 . . ?
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
Zn1 O4 1.970(2) 1_655 ?
Zn1 N1 2.076(2) . ?
Zn1 O8 2.0901(19) 2_766 ?
Zn1 O8 2.0907(19) . ?
Zn1 O2 2.120(2) . ?
Zn2 O6 1.935(2) 1_545 ?
Zn2 O7 1.936(2) 2_676 ?
Zn2 O8 1.9364(19) 2_766 ?
Zn2 O1 1.938(2) . ?
O1 C1 1.258(4) . ?
O2 C1 1.248(3) . ?
O3 C8 1.387(3) . ?
O3 C7 1.391(4) . ?
O4 C15 1.271(4) . ?
O4 Zn1 1.9697(19) 1_455 ?
O5 C15 1.243(4) . ?
O6 C14 1.248(4) . ?
O6 Zn2 1.935(2) 1_565 ?
O7 C14 1.260(3) . ?
O7 Zn2 1.936(2) 2_676 ?
O8 Zn2 1.9364(19) 2_766 ?
O8 Zn1 2.0901(19) 2_766 ?
O8 H8 0.83(2) . ?
N1 C16 1.325(4) . ?
N1 C20 1.329(4) . ?
C1 C2 1.499(4) . ?
C2 C7 1.382(4) . ?
C2 C3 1.391(4) . ?
C3 C4 1.373(5) . ?
C3 H3 0.9300 . ?
C4 C5 1.372(5) . ?
C4 H4 0.9300 . ?
C5 C6 1.388(5) . ?
C5 H5 0.9300 . ?
C6 C7 1.375(5) . ?
C6 H6 0.9300 . ?
C8 C13 1.381(4) . ?
C8 C9 1.385(4) . ?
C9 C10 1.391(4) . ?
C9 H9 0.9300 . ?
C10 C11 1.390(4) . ?
C10 C15 1.508(4) . ?
C14 C12 1.493(4) . ?
C12 C11 1.391(4) . ?
C12 C13 1.392(4) . ?
C13 H13 0.9300 . ?
C11 H11 0.9300 . ?
C16 C17 1.381(5) . ?
C16 H16 0.9300 . ?
C17 C18 1.385(5) . ?
C17 H17 0.9300 . ?
C18 C19 1.382(4) . ?
C18 C18 1.486(5) 2_755 ?
C19 C20 1.374(5) . ?
C19 H19 0.9300 . ?
C20 H20 0.9300 . ?
loop_
_geom_torsion_atom_site_label_1
_geom_torsion_atom_site_label_2
_geom_torsion_atom_site_label_3
_geom_torsion_atom_site_label_4
_geom_torsion
_geom_torsion_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsion_publ_flag
O6 Zn2 O1 C1 -79.6(3) 1_545 . . . ?
O7 Zn2 O1 C1 146.8(2) 2_676 . . . ?
O8 Zn2 O1 C1 33.5(3) 2_766 . . . ?
O4 Zn1 O2 C1 -103.9(3) 1_655 . . . ?
N1 Zn1 O2 C1 149.9(4) . . . . ?
O8 Zn1 O2 C1 1.1(4) 2_766 . . . ?
O8 Zn1 O2 C1 46.7(5) . . . . ?
O4 Zn1 O8 Zn2 -18.68(13) 1_655 . . 2_766 ?
N1 Zn1 O8 Zn2 88.82(12) . . . 2_766 ?
O8 Zn1 O8 Zn2 -122.54(15) 2_766 . . 2_766 ?
O2 Zn1 O8 Zn2 -169.2(2) . . . 2_766 ?
O4 Zn1 O8 Zn1 103.85(9) 1_655 . . 2_766 ?
N1 Zn1 O8 Zn1 -148.64(9) . . . 2_766 ?
O8 Zn1 O8 Zn1 0.0 2_766 . . 2_766 ?
O2 Zn1 O8 Zn1 -46.7(3) . . . 2_766 ?
O4 Zn1 N1 C16 111.1(3) 1_655 . . . ?
O8 Zn1 N1 C16 -68.5(3) 2_766 . . . ?
O8 Zn1 N1 C16 11.5(3) . . . . ?
O2 Zn1 N1 C16 -153.6(3) . . . . ?
O4 Zn1 N1 C20 -60.7(3) 1_655 . . . ?
O8 Zn1 N1 C20 119.7(3) 2_766 . . . ?
O8 Zn1 N1 C20 -160.4(3) . . . . ?
O2 Zn1 N1 C20 34.6(3) . . . . ?
Zn1 O2 C1 O1 -28.9(6) . . . . ?
Zn1 O2 C1 C2 153.4(3) . . . . ?
Zn2 O1 C1 O2 7.5(4) . . . . ?
Zn2 O1 C1 C2 -174.76(19) . . . . ?
O2 C1 C2 C7 -139.5(3) . . . . ?
O1 C1 C2 C7 42.6(4) . . . . ?
O2 C1 C2 C3 43.4(4) . . . . ?
O1 C1 C2 C3 -134.5(3) . . . . ?
C7 C2 C3 C4 -2.1(5) . . . . ?
C1 C2 C3 C4 175.2(3) . . . . ?
C2 C3 C4 C5 0.4(5) . . . . ?
C3 C4 C5 C6 1.7(6) . . . . ?
C4 C5 C6 C7 -2.0(6) . . . . ?
C5 C6 C7 C2 0.3(5) . . . . ?
C5 C6 C7 O3 172.6(3) . . . . ?
C3 C2 C7 C6 1.8(5) . . . . ?
C1 C2 C7 C6 -175.5(3) . . . . ?
C3 C2 C7 O3 -170.6(3) . . . . ?
C1 C2 C7 O3 12.2(4) . . . . ?
C8 O3 C7 C6 65.2(4) . . . . ?
C8 O3 C7 C2 -122.4(3) . . . . ?
C7 O3 C8 C13 -136.8(3) . . . . ?
C7 O3 C8 C9 47.5(4) . . . . ?
C13 C8 C9 C10 0.6(4) . . . . ?
O3 C8 C9 C10 176.2(3) . . . . ?
C8 C9 C10 C11 1.4(4) . . . . ?
C8 C9 C10 C15 -173.4(3) . . . . ?
Zn1 O4 C15 O5 -5.8(4) 1_455 . . . ?
Zn1 O4 C15 C10 172.62(19) 1_455 . . . ?
C11 C10 C15 O5 -1.3(4) . . . . ?
C9 C10 C15 O5 173.5(3) . . . . ?
C11 C10 C15 O4 -179.9(3) . . . . ?
C9 C10 C15 O4 -5.1(4) . . . . ?
Zn2 O6 C14 O7 -17.8(4) 1_565 . . . ?
Zn2 O6 C14 C12 160.17(18) 1_565 . . . ?
Zn2 O7 C14 O6 -39.5(4) 2_676 . . . ?
Zn2 O7 C14 C12 142.6(2) 2_676 . . . ?
O6 C14 C12 C11 155.9(3) . . . . ?
O7 C14 C12 C11 -26.0(4) . . . . ?
O6 C14 C12 C13 -26.1(4) . . . . ?
O7 C14 C12 C13 152.1(3) . . . . ?
C9 C8 C13 C12 -2.2(4) . . . . ?
O3 C8 C13 C12 -178.0(2) . . . . ?
C11 C12 C13 C8 1.9(4) . . . . ?
C14 C12 C13 C8 -176.1(2) . . . . ?
C9 C10 C11 C12 -1.6(4) . . . . ?
C15 C10 C11 C12 173.1(3) . . . . ?
C13 C12 C11 C10 0.0(4) . . . . ?
C14 C12 C11 C10 178.0(3) . . . . ?
C20 N1 C16 C17 -0.6(5) . . . . ?
Zn1 N1 C16 C17 -172.6(3) . . . . ?
N1 C16 C17 C18 0.9(6) . . . . ?
C16 C17 C18 C19 -0.9(5) . . . . ?
C16 C17 C18 C18 178.9(4) . . . 2_755 ?
C17 C18 C19 C20 0.6(5) . . . . ?
C18 C18 C19 C20 -179.2(4) 2_755 . . . ?
C16 N1 C20 C19 0.2(6) . . . . ?
Zn1 N1 C20 C19 172.8(3) . . . . ?
C18 C19 C20 N1 -0.3(6) . . . . ?
