#------------------------------------------------------------------------------
#$Date: 2025-05-03 22:18:48 +0300 (Sat, 03 May 2025) $
#$Revision: 299513 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/02/34/2023421.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_2023421
loop_
_publ_author_name
'Wójcicka, Anna'
'Bryndal, Iwona'
'Krupińska, Magdalena'
'Wolska, Aleksandra'
'Milewski, Jakub'
'Pyra, Anna'
'Becan, Lilianna'
'Mączyński, Marcin'
'Matera-Witkiewicz, Agnieszka'
_publ_section_title
;
 7-(4-Chlorophenyl)-1-hydroxy-5-methylpyrido[3,4-d]pyridazin-4(3H)-one:
 synthesis, solvatomorphism, in vitro anti-inflammatory and cytotoxic
 activity studies and in silico analysis.
;
_journal_coeditor_code           OJ3026
_journal_issue                   'Pt 4'
_journal_name_full
'Acta crystallographica. Section C, Structural chemistry'
_journal_page_first              198
_journal_page_last               211
_journal_paper_doi               10.1107/S2053229625001858
_journal_volume                  81
_journal_year                    2025
_chemical_formula_iupac          '2C14 H10 Cl N3 O2, 3C2 H6 S O'
_chemical_formula_moiety         '2(C14 H10 Cl N3 O2), 3(C2 H6 S O)'
_chemical_formula_sum            'C34 H38 Cl2 N6 O7 S3'
_chemical_formula_weight         809.78
_chemical_name_systematic
'7-(4-Chlorophenyl)-1-hydroxy-5-methylpyrido[3,4-d]pyridazin-4(3H)-one dimethyl sulfoxide sesquisolvate'
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/1
_cell_angle_alpha                90
_cell_angle_beta                 103.05(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   26.379(5)
_cell_length_b                   6.539(2)
_cell_length_c                   22.020(5)
_cell_measurement_reflns_used    10022
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      75.3550
_cell_measurement_theta_min      3.4430
_cell_volume                     3700.2(16)
_computing_cell_refinement
;
CrysAlis PRO (Rigaku OD, 2024)
;
_computing_data_collection
;
CrysAlis PRO (Rigaku OD, 2024)
;
_computing_data_reduction
;
CrysAlis PRO (Rigaku OD, 2024)
;
_computing_molecular_graphics
;
DIAMOND (Brandenburg & Putz, 2014) and Mercury (Macrae et al.,
2020)
;
_computing_publication_material
;
PLATON (Spek, 2020)
;
_computing_structure_refinement
;
SHELXL2018 (Sheldrick, 2015b)
;
_computing_structure_solution
;
SHELXS97 (Sheldrick, 2008)
;
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 10.0000
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type
'Rigaku XtaLAB Synergy-R DW diffractometer with a HyPix-Arc 150 detector'
_diffrn_measurement_method       'ω scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0293
_diffrn_reflns_av_unetI/netI     0.0234
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            18828
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         75.436
_diffrn_reflns_theta_min         3.440
_diffrn_source                   'Rotating-anode X-ray tube'
_exptl_absorpt_coefficient_mu    3.636
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.81293
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
(CrysAlis PRO; Rigaku OD, 2024)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.454
_exptl_crystal_description       needle
_exptl_crystal_F_000             1688
_exptl_crystal_size_max          0.668
_exptl_crystal_size_mid          0.021
_exptl_crystal_size_min          0.016
_refine_diff_density_max         0.323
_refine_diff_density_min         -0.363
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     249
_refine_ls_number_reflns         3784
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0375
_refine_ls_R_factor_gt           0.0323
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[σ²(Fo²)+(0.0486P)²+3.7100P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0879
_refine_ls_wR_factor_ref         0.0913
_reflns_number_gt                3332
_reflns_number_total             3784
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            oj3026sup1.cif
_cod_data_source_block           II
_cod_depositor_comments
'Adding full bibliography for 2023420--2023421.cif.'
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2023421
_cod_database_fobs_code          2023421
_shelx_space_group_comment
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_shelx_estimated_absorpt_t_min   0.195
_shelx_estimated_absorpt_t_max   0.944
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x, y, -z+1/2'
'x+1/2, y+1/2, z'
'-x+1/2, y+1/2, -z+1/2'
'-x, -y, -z'
'x, -y, z-1/2'
'-x+1/2, -y+1/2, -z'
'x+1/2, -y+1/2, z-1/2'
loop_
_atom_site_type_symbol
_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_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
S S2S 0.00560(3) 0.73916(14) 0.72107(4) 0.0332(2) Uani d 0.5 A -1
Cl Cl1 0.13054(2) 1.34167(6) 0.72810(2) 0.03173(12) Uani d 1 . .
O O4 0.27944(4) -0.05400(16) 0.55461(5) 0.0230(2) Uani d 1 . .
O O1 0.08244(4) 0.21129(18) 0.48057(6) 0.0279(3) Uani d 1 . .
H H1 0.064792 0.120120 0.458541 0.042 Uiso calc 1 . .
N N2 0.14574(5) -0.0222(2) 0.47805(6) 0.0221(3) Uani d 1 . .
N N6 0.23539(5) 0.50714(19) 0.63092(6) 0.0201(3) Uani d 1 . .
N N3 0.19699(5) -0.0792(2) 0.49858(6) 0.0205(3) Uani d 1 . .
H H3 0.206358 -0.192877 0.482763 0.025 Uiso calc 1 . .
C C4 0.23470(6) 0.0194(2) 0.54033(7) 0.0191(3) Uani d 1 . .
C C7 0.18604(6) 0.5732(2) 0.60784(7) 0.0185(3) Uani d 1 . .
C C1 0.13206(6) 0.1487(2) 0.49899(7) 0.0213(3) Uani d 1 . .
C C8 0.15106(6) 0.4636(2) 0.56359(7) 0.0197(3) Uani d 1 . .
H H8 0.116732 0.512906 0.547837 0.024 Uiso calc 1 . .
C C73 0.19781(6) 1.0555(2) 0.70437(7) 0.0233(3) Uani d 1 . .
H H73 0.224084 1.129609 0.732377 0.028 Uiso calc 1 . .
C C72 0.21007(6) 0.8796(2) 0.67593(7) 0.0207(3) Uani d 1 . .
H H72 0.245165 0.834023 0.684367 0.025 Uiso calc 1 . .
C C9 0.16728(6) 0.2787(2) 0.54255(7) 0.0187(3) Uani d 1 . .
C C71 0.17187(6) 0.7674(2) 0.63499(7) 0.0191(3) Uani d 1 . .
C C74 0.14655(6) 1.1222(2) 0.69142(7) 0.0230(3) Uani d 1 . .
C C75 0.10785(6) 1.0183(2) 0.64987(8) 0.0262(3) Uani d 1 . .
H H75 0.073059 1.067462 0.640546 0.031 Uiso calc 1 . .
C C76 0.12079(6) 0.8409(2) 0.62209(8) 0.0240(3) Uani d 1 . .
H H76 0.094428 0.768251 0.593782 0.029 Uiso calc 1 . .
C C10 0.21859(6) 0.2113(2) 0.56483(7) 0.0184(3) Uani d 1 . .
C C5 0.25182(6) 0.3331(2) 0.61048(7) 0.0193(3) Uani d 1 . .
C C51 0.30687(6) 0.2749(3) 0.64063(8) 0.0254(3) Uani d 1 . .
H H511 0.322004 0.378570 0.671588 0.038 Uiso calc 1 . .
H H512 0.327402 0.266364 0.608768 0.038 Uiso calc 1 . .
H H513 0.307099 0.141914 0.661195 0.038 Uiso calc 1 . .
C C3S 0.0581(3) 0.8461(11) 0.7785(3) 0.0448(8) Uani d 0.5 A -1
H H3S1 0.064384 0.987174 0.767056 0.067 Uiso calc 0.5 A -1
H H3S2 0.089656 0.764649 0.780632 0.067 Uiso calc 0.5 A -1
H H3S3 0.049036 0.845037 0.819291 0.067 Uiso calc 0.5 A -1
O O2S 0.000000 0.5332(3) 0.750000 0.0472(5) Uani d 1 . .
C C4S -0.0441(2) 0.9058(10) 0.7273(3) 0.0448(8) Uani d 0.5 A -1
H H4S1 -0.062623 0.852430 0.757831 0.067 Uiso calc 0.5 A -1
H H4S2 -0.068441 0.918779 0.686633 0.067 Uiso calc 0.5 A -1
H H4S3 -0.029428 1.040186 0.740879 0.067 Uiso calc 0.5 A -1
S S1S 0.04602(2) -0.28094(6) 0.43380(2) 0.02608(12) Uani d 1 . .
C C1S 0.08315(6) -0.3742(3) 0.38120(8) 0.0299(4) Uani d 1 . .
H H1S1 0.061544 -0.373861 0.338681 0.045 Uiso calc 1 . .
H H1S2 0.094778 -0.514016 0.392896 0.045 Uiso calc 1 . .
H H1S3 0.113505 -0.286008 0.383136 0.045 Uiso calc 1 . .
C C2S -0.00997(7) -0.4398(3) 0.40989(10) 0.0365(4) Uani d 1 . .
H H2S1 -0.023146 -0.427902 0.364713 0.055 Uiso calc 1 . .
H H2S2 -0.037009 -0.396377 0.431194 0.055 Uiso calc 1 . .
H H2S3 -0.000502 -0.582336 0.420641 0.055 Uiso calc 1 . .
O O1S 0.02733(4) -0.06821(18) 0.41115(6) 0.0322(3) Uani d 1 . .
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0181 0.0091 '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'
Cl Cl 0.3639 0.7018 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
N N 0.0311 0.0180 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
O O 0.0492 0.0322 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
S S 0.3331 0.5567 '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
_geom_angle_publ_flag
O2S S2S C4S . . 112.26(19) ?
O2S S2S C3S . . 100.6(2) ?
C4S S2S C3S . . 100.2(3) ?
C1 O1 H1 . . 109.5 ?
C1 N2 N3 . . 116.74(13) ?
C5 N6 C7 . . 120.23(13) ?
C4 N3 N2 . . 127.59(13) ?
C4 N3 H3 . . 116.2 ?
N2 N3 H3 . . 116.2 ?
O4 C4 N3 . . 119.73(13) ?
O4 C4 C10 . . 124.98(14) ?
N3 C4 C10 . . 115.29(13) ?
N6 C7 C8 . . 122.03(14) ?
N6 C7 C71 . . 115.37(13) ?
C8 C7 C71 . . 122.56(13) ?
N2 C1 O1 . . 119.19(14) ?
N2 C1 C9 . . 123.68(14) ?
O1 C1 C9 . . 117.12(13) ?
C7 C8 C9 . . 118.52(13) ?
C7 C8 H8 . . 120.7 ?
C9 C8 H8 . . 120.7 ?
C72 C73 C74 . . 119.03(14) ?
C72 C73 H73 . . 120.5 ?
C74 C73 H73 . . 120.5 ?
C73 C72 C71 . . 121.35(14) ?
C73 C72 H72 . . 119.3 ?
C71 C72 H72 . . 119.3 ?
C8 C9 C10 . . 120.00(14) ?
C8 C9 C1 . . 121.90(13) ?
C10 C9 C1 . . 118.07(13) ?
C76 C71 C72 . . 118.12(14) ?
C76 C71 C7 . . 122.04(13) ?
C72 C71 C7 . . 119.82(13) ?
C75 C74 C73 . . 121.35(14) ?
C75 C74 Cl1 . . 119.32(12) ?
C73 C74 Cl1 . . 119.33(12) ?
C74 C75 C76 . . 118.84(15) ?
C74 C75 H75 . . 120.6 ?
C76 C75 H75 . . 120.6 ?
C75 C76 C71 . . 121.29(15) ?
C75 C76 H76 . . 119.4 ?
C71 C76 H76 . . 119.4 ?
C9 C10 C5 . . 117.65(13) ?
C9 C10 C4 . . 118.50(13) ?
C5 C10 C4 . . 123.84(13) ?
N6 C5 C10 . . 121.52(13) ?
N6 C5 C51 . . 115.01(13) ?
C10 C5 C51 . . 123.44(13) ?
C5 C51 H511 . . 109.5 ?
C5 C51 H512 . . 109.5 ?
H511 C51 H512 . . 109.5 ?
C5 C51 H513 . . 109.5 ?
H511 C51 H513 . . 109.5 ?
H512 C51 H513 . . 109.5 ?
S2S C3S H3S1 . . 109.5 ?
S2S C3S H3S2 . . 109.5 ?
H3S1 C3S H3S2 . . 109.5 ?
S2S C3S H3S3 . . 109.5 ?
H3S1 C3S H3S3 . . 109.5 ?
H3S2 C3S H3S3 . . 109.5 ?
S2S C4S H4S1 . . 109.5 ?
S2S C4S H4S2 . . 109.5 ?
H4S1 C4S H4S2 . . 109.5 ?
S2S C4S H4S3 . . 109.5 ?
H4S1 C4S H4S3 . . 109.5 ?
H4S2 C4S H4S3 . . 109.5 ?
O1S S1S C1S . . 106.52(8) ?
O1S S1S C2S . . 104.47(8) ?
C1S S1S C2S . . 98.54(9) ?
S1S C1S H1S1 . . 109.5 ?
S1S C1S H1S2 . . 109.5 ?
H1S1 C1S H1S2 . . 109.5 ?
S1S C1S H1S3 . . 109.5 ?
H1S1 C1S H1S3 . . 109.5 ?
H1S2 C1S H1S3 . . 109.5 ?
S1S C2S H2S1 . . 109.5 ?
S1S C2S H2S2 . . 109.5 ?
H2S1 C2S H2S2 . . 109.5 ?
S1S C2S H2S3 . . 109.5 ?
H2S1 C2S H2S3 . . 109.5 ?
H2S2 C2S H2S3 . . 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
S2S O2S . 1.511(2) ?
S2S C4S . 1.734(7) ?
S2S C3S . 1.794(8) ?
Cl1 C74 . 1.7449(16) ?
O4 C4 . 1.2469(18) ?
O1 C1 . 1.3436(18) ?
O1 H1 . 0.8400 ?
N2 C1 . 1.291(2) ?
N2 N3 . 1.3764(17) ?
N6 C5 . 1.3315(19) ?
N6 C7 . 1.3569(19) ?
N3 C4 . 1.356(2) ?
N3 H3 . 0.8800 ?
C4 C10 . 1.466(2) ?
C7 C8 . 1.382(2) ?
C7 C71 . 1.486(2) ?
C1 C9 . 1.450(2) ?
C8 C9 . 1.396(2) ?
C8 H8 . 0.9500 ?
C73 C72 . 1.383(2) ?
C73 C74 . 1.388(2) ?
C73 H73 . 0.9500 ?
C72 C71 . 1.399(2) ?
C72 H72 . 0.9500 ?
C9 C10 . 1.403(2) ?
C71 C76 . 1.398(2) ?
C74 C75 . 1.385(2) ?
C75 C76 . 1.389(2) ?
C75 H75 . 0.9500 ?
C76 H76 . 0.9500 ?
C10 C5 . 1.420(2) ?
C5 C51 . 1.503(2) ?
C51 H511 . 0.9800 ?
C51 H512 . 0.9800 ?
C51 H513 . 0.9800 ?
C3S H3S1 . 0.9800 ?
C3S H3S2 . 0.9800 ?
C3S H3S3 . 0.9800 ?
C4S H4S1 . 0.9800 ?
C4S H4S2 . 0.9800 ?
C4S H4S3 . 0.9800 ?
S1S O1S . 1.5218(13) ?
S1S C1S . 1.7847(18) ?
S1S C2S . 1.7852(18) ?
C1S H1S1 . 0.9800 ?
C1S H1S2 . 0.9800 ?
C1S H1S3 . 0.9800 ?
C2S H2S1 . 0.9800 ?
C2S H2S2 . 0.9800 ?
C2S H2S3 . 0.9800 ?
loop_
_geom_hbond_atom_site_label_D
_geom_hbond_atom_site_label_H
_geom_hbond_atom_site_label_A
_geom_hbond_site_symmetry_A
_geom_hbond_distance_DH
_geom_hbond_distance_HA
_geom_hbond_distance_DA
_geom_hbond_angle_DHA
_geom_hbond_publ_flag
O1 H1 S1S . 0.84 2.70 3.4492(15) 149.1 no
O1 H1 O1S . 0.84 1.77 2.6052(17) 179.0 yes
N3 H3 O4 7_546 0.88 1.92 2.8004(18) 175.1 yes
C75 H75 O1S 5_566 0.95 2.64 3.530(2) 157.1 yes
C51 H512 N2 7_556 0.98 2.75 3.533(2) 137.2 no
C3S H3S1 Cl1 . 0.98 3.14 4.042(8) 154.5 no
C3S H3S3 O1S 6_566 0.98 2.66 3.517(6) 146.3 yes
C4S H4S2 O1S 5_566 0.98 2.80 3.351(6) 116.5 no
C1S H1S1 O2S 5_556 0.98 2.47 3.373(2) 153.0 yes
C1S H1S2 O1 1_545 0.98 2.71 3.486(2) 136.4 yes
C1S H1S3 N2 . 0.98 2.70 3.314(2) 121.5 yes
C2S H2S1 Cl1 5_566 0.98 3.15 3.924(2) 137.2 no
C2S H2S1 O2S 5_556 0.98 2.81 3.641(2) 142.4 no
C2S H2S2 O1 5_556 0.98 2.78 3.713(2) 159.4 no
C2S H2S3 O1 1_545 0.98 2.65 3.443(2) 137.7 yes
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_site_symmetry_1
_geom_torsion_site_symmetry_2
_geom_torsion_site_symmetry_3
_geom_torsion_site_symmetry_4
_geom_torsion
_geom_torsion_publ_flag
C1 N2 N3 C4 . . . . 2.8(2) ?
N2 N3 C4 O4 . . . . 179.20(13) ?
N2 N3 C4 C10 . . . . -1.6(2) ?
C5 N6 C7 C8 . . . . 0.9(2) ?
C5 N6 C7 C71 . . . . 178.95(13) ?
N3 N2 C1 O1 . . . . -179.81(13) ?
N3 N2 C1 C9 . . . . -0.6(2) ?
N6 C7 C8 C9 . . . . 0.4(2) ?
C71 C7 C8 C9 . . . . -177.52(13) ?
C74 C73 C72 C71 . . . . -0.6(2) ?
C7 C8 C9 C10 . . . . -2.0(2) ?
C7 C8 C9 C1 . . . . 176.27(14) ?
N2 C1 C9 C8 . . . . 179.32(14) ?
O1 C1 C9 C8 . . . . -1.5(2) ?
N2 C1 C9 C10 . . . . -2.4(2) ?
O1 C1 C9 C10 . . . . 176.83(13) ?
C73 C72 C71 C76 . . . . 1.7(2) ?
C73 C72 C71 C7 . . . . -176.83(14) ?
N6 C7 C71 C76 . . . . -171.49(14) ?
C8 C7 C71 C76 . . . . 6.5(2) ?
N6 C7 C71 C72 . . . . 7.0(2) ?
C8 C7 C71 C72 . . . . -174.98(14) ?
C72 C73 C74 C75 . . . . -1.2(2) ?
C72 C73 C74 Cl1 . . . . 178.94(11) ?
C73 C74 C75 C76 . . . . 1.7(2) ?
Cl1 C74 C75 C76 . . . . -178.44(12) ?
C74 C75 C76 C71 . . . . -0.5(2) ?
C72 C71 C76 C75 . . . . -1.2(2) ?
C7 C71 C76 C75 . . . . 177.32(14) ?
C8 C9 C10 C5 . . . . 2.3(2) ?
C1 C9 C10 C5 . . . . -176.00(13) ?
C8 C9 C10 C4 . . . . -178.22(13) ?
C1 C9 C10 C4 . . . . 3.4(2) ?
O4 C4 C10 C9 . . . . 177.54(14) ?
N3 C4 C10 C9 . . . . -1.7(2) ?
O4 C4 C10 C5 . . . . -3.1(2) ?
N3 C4 C10 C5 . . . . 177.75(13) ?
C7 N6 C5 C10 . . . . -0.5(2) ?
C7 N6 C5 C51 . . . . -178.86(13) ?
C9 C10 C5 N6 . . . . -1.1(2) ?
C4 C10 C5 N6 . . . . 179.52(13) ?
C9 C10 C5 C51 . . . . 177.09(14) ?
C4 C10 C5 C51 . . . . -2.3(2) ?
