organic compounds
Powder study of N-[2-(4-hydroxy-2-oxo-2,3-dihydro-1,3-benzothiazol-7-yl)ethyl]-3-[2-(2-naphthalen-1-ylethoxy)ethylsulfonyl]propylaminium benzoate
aDepartment of Pharmaceutical Sciences, University of Strathclyde, 27 Taylor Street, Glasgow G4 0NR, Scotland, bISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, England, and cAstraZeneca R&D Charnwood, Loughborough, Leics LE11 5RH, England
*Correspondence e-mail: k.shankland@rl.ac.uk
The 26H31N2O5S2+·C7O2H5−, also known as AR-C69457CC, was solved by simulated annealing from laboratory X-ray powder diffraction data collected at room temperature to 2.1 Å resolution. Subsequent yielded an Rwp of 0.038 and site-occupancy factors for the disordered anion components of 0.5.
of the title compound, CComment
The title compound, (I), was synthesized by AstraZeneca during the development of a potential treatment for chronic obstructive pulmonary disease. The of (I) was solved as part of a wider investigation into the application of simulated annealing to the problem of solving pharmaceutical crystal structures from laboratory X-ray powder diffraction data (Docherty, 2004). The hydrogen bonding and ring interactions in (I) are summarized in Fig. 3. Hydrogen bond `a' [O1⋯N2 = 2.82 (6) Å] links two cations to form a centrosymmetric dimer, within which the heterocyclic rings make face-to-face contact (R1⋯R1′ in Fig. 3) and the carbonyl O atom makes a close approach to the centroid of benzene ring R2′ [O1⋯centroid = 3.54 (3) Å and C1—O1⋯centroid = 95 (3)°]. The heterocyclic ring also engages in face-to-face contact with the C2–C7 benzene ring (Fig. 3, top right, R1⋯R2a and R2⋯R1a). The donor–acceptor distances for the three cation–anion hydrogen bonds `b' to `d' fall in the range 2.38 (12)–2.51 (13) Å and the hydrogen-bonding scheme is preserved on switching between the two half-occupancy anion sites. The naphthalene rings engage with each other in offset face-to-face interactions (Fig. 3, bottom right) and pack, along with the benzoate phenyl ring, to form a hydrophobic layer in the ab plane.
Experimental
A polycrystalline sample of the title compound was recrystallized from acetonitrile solution by slow evaporation at room temperature. Data were collected from a sample in a rotating 0.7 mm borosilicate glass capillary using a variable count time scheme (Hill & Madsen, 2002).
Crystal data
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Data collection
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Refinement
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The diffraction pattern indexed to a triclinic cell [F(20) = 124.5, M(20) = 33.5; DICVOL91 (Boultif & Louer, 1991)] and P was assigned from volume considerations and a lack of The data set was background subtracted and truncated to 42° 2θ for Pawley fitting (Pawley, 1981; χ2Pawley = 2.7) and the structure solved using the simulated annealing (SA) global optimization procedure, described previously (David et al., 1998), that is now implemented in the DASH computer program (David et al., 2001). The SA structure solution involved the optimization of two fragments (the cation with 13 torsion angles plus the anion) totaling 26 The best SA solution had a favourable χ2SA/χ2Pawley ratio of 5.7 and a chemically sensible packing arrangement, but suffered from a significant misfit to the data, even at modest 2θ angles. Rerunning the SA with the cation fixed in its previously determined position and optimizing the positions and orientations of two 50% occupancy anions halved the χ2SA/χ2Pawley ratio to 2.9 and significantly improved the fit at lower 2θ angles. The solved structure was then refined against the full data set (5–69° 2θ) using a restrained (Rietveld, 1969) as implemented in TOPAS (Coelho, 2003), with the Rwp falling from 0.064 to 0.038 during the All cation atomic positions (including H atoms) were refined, subject to a series of restraints on bond lengths, angles and, where appropriate, planarity. The distance and angle restraints were based on a geometric analysis of five cations in four crystal structures (Docherty, 2004) closely related to the title compound, namely (a) 2-(4-hydroxy-2-oxo-2,3-dihydro-1,3-benzothiazol-7-yl)ethylammonium chloride, (b) the monohydrate of (a), (c) N-[2-(4-hydroxy-2-oxo-2,3-dihydro-1,3-benzothiazol-7-yl)ethyl]-3-[2-(2-(4-methylphenyl)ethoxy)ethylsulfamoyl]propylaminium besilate besilate and (d) the tosilate analogue of (c). This was supplemented by a geometric analysis of naphthalene rings using the knowledge base, MOGUL (Bruno et al., 2004). The half-occupancy anions could not be refined reliably using the strategy just described and were therefore refined as rigid bodies. A March–Dollase correction of intensities for (Dollase, 1986) was applied and the refined value of the coefficient along the [001] direction was 1.13 (1).
Data collection: DIFFRAC Plus XRD Commander (Kienle & Jacob, 2003); cell TOPAS (Coelho, 2003); data reduction: DASH (David et al., 2001); program(s) used to solve structure: DASH; program(s) used to refine structure: TOPAS; molecular graphics: PLATON (Spek, 2003); software used to prepare material for publication: enCIFer (Cambridge Crystallographic Data Centre, 2004).
Supporting information
https://doi.org/10.1107/S1600536804021105/cv6353sup1.cif
contains datablocks global, I. DOI:Rietveld powder data: contains datablock I. DOI: https://doi.org/10.1107/S1600536804021105/cv6353Isup2.rtv
Data collection: Bruker AXS D8-Advance control sofware; data reduction: DASH (David et al., 2001); program(s) used to solve structure: DASH; program(s) used to refine structure: TOPAS (Coehlo, 2003).
C26H31N2O5S2+·C7H5O2− | Z = 2 |
Mr = 636.77 | F(000) = 672 |
Triclinic, P1 | Dx = 1.328 Mg m−3 |
Hall symbol: -P 1 | Cu Kα1 radiation, λ = 1.54056 Å |
a = 7.63122 (17) Å | µ = 1.94 mm−1 |
b = 13.6673 (3) Å | T = 295 K |
c = 15.8058 (5) Å | Particle morphology: needle |
α = 84.385 (2)° | white |
β = 87.4653 (19)° | cylinder, 12 × 0.7 mm |
γ = 75.7135 (13)° | Specimen preparation: Prepared at 295 K |
V = 1589.52 (7) Å3 |
Bruker AXS D8 Advance diffractometer | Data collection mode: transmission |
Radiation source: sealed X-ray tube | Scan method: step |
Primary focussing, Ge 111 monochromator | 2θmin = 5°, 2θmax = 69.000°, 2θstep = 0.014° |
Specimen mounting: 0.7 mm borosilicate capillary |
Least-squares matrix: selected elements only | 194 restraints |
Rp = 0.037 | 1 constraint |
Rwp = 0.038 | Only H-atom coordinates refined |
Rexp = 0.015 | Weighting scheme based on measured s.u.'s |
4480 data points | (Δ/σ)max = 0.049 |
Profile function: Fundamental parameters with axial divergence correction | Background function: Chebyshev polynomial |
213 parameters | Preferred orientation correction: A March-Dollase correction of intensities for | was applied. The refined value of the coefficient along the [0 0 1] direction was 1.13(1).
Geometry. Bond distances, bond angles, torsion angles and H-bond geometries were calculated using PLATON (Spek, 2003; program version 280604) |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
S1 | 0.8648 (18) | 0.4241 (10) | 0.5995 (11) | 0.0588 (15)* | |
S2 | 1.249 (2) | 0.9911 (10) | 0.5989 (12) | 0.0588 (15)* | |
O1 | 0.993 (3) | 0.301 (2) | 0.478 (2) | 0.0588 (15)* | |
O2 | 0.555 (4) | 0.625 (2) | 0.347 (3) | 0.0588 (15)* | |
O3 | 1.381 (3) | 0.9424 (19) | 0.661 (2) | 0.0588 (15)* | |
O4 | 1.277 (3) | 0.956 (2) | 0.515 (2) | 0.0588 (15)* | |
O5 | 1.062 (4) | 1.182 (3) | 0.711 (2) | 0.0588 (15)* | |
N1 | 0.792 (7) | 0.453 (4) | 0.441 (3) | 0.0588 (15)* | |
N2 | 0.863 (6) | 0.734 (4) | 0.687 (3) | 0.0588 (15)* | |
C1 | 0.896 (7) | 0.382 (4) | 0.495 (3) | 0.0588 (15)* | |
C2 | 0.713 (7) | 0.537 (4) | 0.563 (4) | 0.0588 (15)* | |
C3 | 0.691 (7) | 0.539 (4) | 0.476 (4) | 0.0588 (15)* | |
C4 | 0.576 (6) | 0.622 (4) | 0.432 (5) | 0.0588 (15)* | |
C5 | 0.483 (6) | 0.701 (4) | 0.478 (4) | 0.0588 (15)* | |
H5 | 0.41 (5) | 0.76 (3) | 0.45 (3) | 0.0760* | |
C6 | 0.510 (6) | 0.698 (4) | 0.565 (4) | 0.0588 (15)* | |
H6 | 0.45 (6) | 0.75 (3) | 0.60 (3) | 0.0760* | |
C7 | 0.627 (7) | 0.618 (4) | 0.609 (4) | 0.0588 (15)* | |
C8 | 0.656 (6) | 0.616 (5) | 0.704 (4) | 0.0588 (15)* | |
H8A | 0.76 (5) | 0.56 (3) | 0.72 (3) | 0.0760* | |
H8B | 0.55 (5) | 0.61 (3) | 0.73 (3) | 0.0760* | |
C9 | 0.693 (8) | 0.713 (5) | 0.727 (4) | 0.0588 (15)* | |
H9A | 0.59 (5) | 0.77 (3) | 0.71 (3) | 0.0760* | |
H9B | 0.70 (6) | 0.71 (3) | 0.79 (3) | 0.0760* | |
C10 | 0.856 (7) | 0.845 (5) | 0.678 (4) | 0.0588 (15)* | |
H10A | 0.81 (5) | 0.87 (3) | 0.73 (3) | 0.0760* | |
H10B | 0.78 (6) | 0.88 (3) | 0.63 (3) | 0.0760* | |
C11 | 1.040 (7) | 0.864 (4) | 0.656 (4) | 0.0588 (15)* | |
H11A | 1.09 (5) | 0.83 (3) | 0.61 (3) | 0.0760* | |
H11B | 1.12 (5) | 0.84 (3) | 0.70 (3) | 0.0760* | |
C12 | 1.036 (7) | 0.975 (5) | 0.638 (4) | 0.0588 (15)* | |
H12A | 1.01 (6) | 1.01 (3) | 0.69 (3) | 0.0760* | |
H12B | 0.95 (5) | 1.01 (3) | 0.60 (3) | 0.0760* | |
C13 | 1.241 (6) | 1.123 (4) | 0.589 (4) | 0.0588 (15)* | |
H13A | 1.34 (6) | 1.13 (3) | 0.56 (3) | 0.0760* | |
H13B | 1.13 (5) | 1.16 (3) | 0.56 (3) | 0.0760* | |
C14 | 1.241 (7) | 1.162 (4) | 0.675 (5) | 0.0588 (15)* | |
H14A | 1.32 (5) | 1.11 (3) | 0.71 (3) | 0.0760* | |
H14B | 1.28 (5) | 1.22 (3) | 0.67 (3) | 0.0760* | |
C15 | 1.033 (7) | 1.240 (4) | 0.781 (5) | 0.0588 (15)* | |
H15A | 1.07 (5) | 1.30 (3) | 0.77 (3) | 0.0760* | |
H15B | 1.10 (5) | 1.20 (3) | 0.83 (3) | 0.0760* | |
C16 | 0.832 (8) | 1.267 (4) | 0.803 (3) | 0.0588 (15)* | |
H16A | 0.81 (6) | 1.32 (3) | 0.84 (3) | 0.0760* | |
H16B | 0.77 (5) | 1.29 (3) | 0.75 (2) | 0.0760* | |
C17 | 0.773 (6) | 1.176 (4) | 0.846 (4) | 0.0588 (15)* | |
C18 | 0.705 (7) | 1.116 (5) | 0.797 (3) | 0.0588 (15)* | |
H18 | 0.69 (5) | 1.13 (3) | 0.74 (3) | 0.0760* | |
C19 | 0.650 (7) | 1.033 (4) | 0.835 (4) | 0.0588 (15)* | |
H19 | 0.61 (5) | 0.99 (3) | 0.80 (3) | 0.0760* | |
C20 | 0.673 (7) | 1.004 (3) | 0.920 (5) | 0.0588 (15)* | |
H20 | 0.64 (5) | 0.94 (3) | 0.94 (4) | 0.0760* | |
C21 | 0.747 (6) | 1.062 (4) | 0.972 (5) | 0.0588 (15)* | |
C22 | 0.802 (6) | 1.148 (4) | 0.934 (4) | 0.0588 (15)* | |
C23 | 0.876 (6) | 1.205 (4) | 0.987 (6) | 0.0588 (15)* | |
H23 | 0.91 (6) | 1.27 (3) | 0.96 (3) | 0.0760* | |
C24 | 0.902 (7) | 1.175 (5) | 1.072 (5) | 0.0588 (15)* | |
H24 | 0.94 (6) | 1.22 (3) | 1.11 (3) | 0.0760* | |
C25 | 0.836 (7) | 1.096 (5) | 1.109 (3) | 0.0588 (15)* | |
H25 | 0.85 (5) | 1.08 (3) | 1.17 (3) | 0.0760* | |
C26 | 0.772 (7) | 1.035 (4) | 1.061 (5) | 0.0588 (15)* | |
H26 | 0.74 (5) | 0.98 (3) | 1.09 (3) | 0.0760* | |
H3N | 0.88 (6) | 0.71 (3) | 0.64 (3) | 0.0760* | |
H2N | 0.96 (5) | 0.70 (3) | 0.72 (3) | 0.0760* | |
H1N | 0.79 (7) | 0.45 (4) | 0.39 (3) | 0.0760* | |
H21 | 0.63 (6) | 0.57 (3) | 0.32 (3) | 0.0760* | |
O6 | 0.172 (13) | 0.504 (9) | 0.726 (8) | 0.0588 (15)* | 0.5 |
O7 | 0.117 (13) | 0.632 (9) | 0.803 (8) | 0.0588 (15)* | 0.5 |
C27 | 0.161 (13) | 0.538 (9) | 0.798 (8) | 0.0588 (15)* | 0.5 |
C28 | 0.199 (13) | 0.467 (9) | 0.876 (8) | 0.0588 (15)* | 0.5 |
C29 | 0.318 (13) | 0.373 (9) | 0.873 (8) | 0.0588 (15)* | 0.5 |
C30 | 0.353 (13) | 0.306 (9) | 0.946 (8) | 0.0588 (15)* | 0.5 |
C31 | 0.270 (13) | 0.335 (9) | 1.023 (8) | 0.0588 (15)* | 0.5 |
C32 | 0.150 (13) | 0.429 (9) | 1.026 (8) | 0.0588 (15)* | 0.5 |
C33 | 0.114 (13) | 0.495 (9) | 0.953 (8) | 0.0588 (15)* | 0.5 |
H29 | 0.376 (13) | 0.353 (9) | 0.820 (8) | 0.0760* | 0.5 |
H30 | 0.435 (13) | 0.241 (9) | 0.944 (8) | 0.0760* | 0.5 |
H31 | 0.294 (13) | 0.289 (9) | 1.073 (8) | 0.0760* | 0.5 |
H32 | 0.094 (13) | 0.448 (9) | 1.079 (8) | 0.0760* | 0.5 |
H33 | 0.032 (13) | 0.559 (9) | 0.955 (8) | 0.0760* | 0.5 |
O6P | 0.268 (13) | 0.520 (9) | 0.715 (8) | 0.0588 (15)* | 0.5 |
O7P | 0.093 (13) | 0.632 (9) | 0.790 (8) | 0.0588 (15)* | 0.5 |
C27P | 0.213 (13) | 0.550 (9) | 0.786 (8) | 0.0588 (15)* | 0.5 |
C28P | 0.289 (13) | 0.490 (9) | 0.866 (8) | 0.0588 (15)* | 0.5 |
C29P | 0.346 (13) | 0.385 (9) | 0.869 (8) | 0.0588 (15)* | 0.5 |
C30P | 0.415 (13) | 0.329 (9) | 0.943 (8) | 0.0588 (15)* | 0.5 |
C31P | 0.430 (13) | 0.379 (9) | 1.014 (8) | 0.0588 (15)* | 0.5 |
C32P | 0.375 (13) | 0.484 (9) | 1.011 (8) | 0.0588 (15)* | 0.5 |
C33P | 0.303 (13) | 0.539 (9) | 0.937 (8) | 0.0588 (15)* | 0.5 |
H29P | 0.336 (13) | 0.352 (9) | 0.820 (8) | 0.0760* | 0.5 |
H30P | 0.453 (13) | 0.258 (9) | 0.945 (8) | 0.0760* | 0.5 |
H31P | 0.478 (13) | 0.340 (9) | 1.065 (8) | 0.0760* | 0.5 |
H32P | 0.385 (13) | 0.517 (9) | 1.060 (8) | 0.0760* | 0.5 |
H33P | 0.265 (13) | 0.611 (9) | 0.935 (8) | 0.0760* | 0.5 |
S1—C1 | 1.79 (5) | C10—H10B | 1.0 (4) |
S1—C2 | 1.75 (6) | C11—H11A | 0.9 (4) |
S2—O3 | 1.43 (3) | C11—H11B | 0.9 (5) |
S2—O4 | 1.44 (4) | C12—H12A | 1.0 (5) |
S2—C12 | 1.77 (6) | C12—H12B | 0.9 (4) |
S2—C13 | 1.78 (5) | C13—H13B | 1.0 (4) |
O1—C1 | 1.22 (6) | C13—H13A | 0.9 (5) |
O2—C4 | 1.36 (9) | C14—H14B | 0.9 (5) |
O5—C14 | 1.43 (7) | C14—H14A | 1.0 (5) |
O5—C15 | 1.40 (8) | C15—H15A | 0.9 (4) |
N1—C1 | 1.35 (7) | C15—H15B | 1.0 (5) |
N1—C3 | 1.39 (8) | C16—H16A | 1.0 (5) |
N2—C10 | 1.50 (8) | C16—H16B | 1.0 (3) |
N2—C9 | 1.50 (8) | C18—H18 | 0.9 (5) |
C2—C3 | 1.39 (9) | C19—H19 | 1.0 (3) |
C2—C7 | 1.39 (8) | C20—H20 | 1.0 (5) |
C3—C4 | 1.40 (8) | C23—H23 | 1.0 (5) |
C4—C5 | 1.39 (8) | C24—H24 | 1.0 (5) |
C5—C6 | 1.40 (9) | C25—H25 | 1.0 (5) |
C6—C7 | 1.38 (8) | C26—H26 | 0.9 (4) |
C7—C8 | 1.52 (9) | O6—C27 | 1.26 |
C8—C9 | 1.50 (9) | O6P—C27P | 1.25 |
C10—C11 | 1.51 (8) | O7—C27 | 1.25 |
C11—C12 | 1.51 (9) | O7P—C27P | 1.27 |
C13—C14 | 1.51 (10) | C27—C28 | 1.48 |
C15—C16 | 1.52 (8) | C27P—C28P | 1.50 |
C16—C17 | 1.52 (8) | C28—C29 | 1.38 |
C17—C18 | 1.38 (8) | C28P—C29P | 1.39 |
C17—C22 | 1.42 (9) | C28—C33 | 1.40 |
C18—C19 | 1.38 (8) | C28P—C33P | 1.38 |
C19—C20 | 1.37 (10) | C29—C30 | 1.39 |
C20—C21 | 1.42 (9) | C29P—C30P | 1.38 |
C21—C26 | 1.43 (11) | C30—C31 | 1.39 |
C21—C22 | 1.42 (8) | C30P—C31P | 1.39 |
C22—C23 | 1.42 (9) | C31—C32 | 1.39 |
C23—C24 | 1.37 (12) | C31P—C32P | 1.39 |
C24—C25 | 1.37 (9) | C32—C33 | 1.39 |
C25—C26 | 1.37 (9) | C32P—C33P | 1.38 |
O2—H21 | 1.0 (4) | C29—H29 | 0.96 |
N1—H1N | 0.8 (5) | C29P—H29P | 0.95 |
N2—H2N | 0.9 (5) | C30—H30 | 0.95 |
N2—H3N | 0.8 (4) | C30P—H30P | 0.94 |
C5—H5 | 0.9 (4) | C31—H31 | 0.96 |
C6—H6 | 1.0 (5) | C31P—H31P | 0.96 |
C8—H8A | 1.0 (4) | C32—H32 | 0.95 |
C8—H8B | 0.9 (4) | C32P—H32P | 0.95 |
C9—H9A | 1.0 (4) | C33—H33 | 0.94 |
C9—H9B | 1.0 (5) | C33P—H33P | 0.95 |
C10—H10A | 0.9 (5) | ||
C1—S1—C2 | 92 (3) | C17—C22—C21 | 119 (5) |
O3—S2—O4 | 117 (2) | C22—C23—C24 | 121 (6) |
O3—S2—C12 | 108 (3) | C23—C24—C25 | 120 (6) |
O3—S2—C13 | 108 (2) | C24—C25—C26 | 121 (6) |
O4—S2—C12 | 108 (2) | C21—C26—C25 | 120 (5) |
O4—S2—C13 | 108 (3) | O6—C27—O7 | 119 |
C12—S2—C13 | 108 (3) | O6P—C27P—O7P | 120 |
C14—O5—C15 | 116 (4) | O6—C27—C28 | 120 |
C1—N1—C3 | 116 (5) | O6P—C27P—C28P | 120 |
C9—N2—C10 | 112 (5) | O7—C27—C28 | 120 |
O1—C1—N1 | 127 (5) | O7P—C27P—C28P | 120 |
S1—C1—N1 | 109 (4) | C27—C28—C29 | 120 |
S1—C1—O1 | 124 (4) | C27P—C28P—C29P | 120 |
S1—C2—C3 | 110 (4) | C27—C28—C33 | 120 |
C3—C2—C7 | 122 (5) | C27P—C28P—C33P | 120 |
S1—C2—C7 | 128 (5) | C29—C28—C33 | 120 |
N1—C3—C2 | 114 (5) | C29P—C28P—C33P | 120 |
C2—C3—C4 | 121 (5) | C28—C29—C30 | 121 |
N1—C3—C4 | 126 (6) | C28P—C29P—C30P | 120 |
O2—C4—C5 | 121 (5) | C29—C30—C31 | 120 |
O2—C4—C3 | 121 (5) | C29P—C30P—C31P | 119 |
C3—C4—C5 | 118 (7) | C30—C31—C32 | 120 |
C4—C5—C6 | 120 (5) | C30P—C31P—C32P | 121 |
C5—C6—C7 | 122 (5) | C31—C32—C33 | 120 |
C2—C7—C8 | 121 (5) | C31P—C32P—C33P | 120 |
C6—C7—C8 | 122 (5) | C28—C33—C32 | 120 |
C2—C7—C6 | 117 (6) | C28P—C33P—C32P | 120 |
C7—C8—C9 | 112 (5) | C28—C29—H29 | 120 |
N2—C9—C8 | 114 (5) | C28P—C29P—H29P | 119 |
N2—C10—C11 | 112 (5) | C30—C29—H29 | 119 |
C10—C11—C12 | 113 (5) | C30P—C29P—H29P | 120 |
S2—C12—C11 | 111 (4) | C29—C30—H30 | 120 |
S2—C13—C14 | 111 (4) | C29P—C30P—H30P | 120 |
O5—C14—C13 | 110 (4) | C31—C30—H30 | 120 |
O5—C15—C16 | 109 (5) | C31P—C30P—H30P | 120 |
C15—C16—C17 | 111 (4) | C30—C31—H31 | 120 |
C18—C17—C22 | 121 (5) | C30P—C31P—H31P | 119 |
C16—C17—C18 | 119 (5) | C32—C31—H31 | 121 |
C16—C17—C22 | 120 (5) | C32P—C31P—H31P | 120 |
C17—C18—C19 | 120 (5) | C31—C32—H32 | 119 |
C18—C19—C20 | 121 (5) | C31P—C32P—H32P | 120 |
C19—C20—C21 | 120 (5) | C33—C32—H32 | 121 |
C20—C21—C26 | 122 (5) | C33P—C32P—H32P | 121 |
C22—C21—C26 | 119 (5) | C28—C33—H33 | 120 |
C20—C21—C22 | 119 (6) | C28P—C33P—H33P | 120 |
C17—C22—C23 | 123 (5) | C32—C33—H33 | 120 |
C21—C22—C23 | 118 (6) | C32P—C33P—H33P | 120 |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H3N···O1i | 0.8 (4) | 2.1 (5) | 2.82 (6) | 151 (12) |
N2—H2N···O7Pii | 0.9 (5) | 1.6 (4) | 2.51 (13) | 167 (14) |
N1—H1N···O6Piii | 0.8 (5) | 1.7 (5) | 2.50 (13) | 161 (13) |
O2—H21···O6Piii | 1.0 (4) | 1.4 (5) | 2.38 (12) | 174 (13) |
N2—H2N···O7ii | 0.9 (5) | 1.8 (4) | 2.75 (13) | 168 (14) |
N1—H1N···O6iii | 0.8 (5) | 1.9 (5) | 2.67 (13) | 152 (13) |
O2—H21···O6iii | 1.0 (4) | 1.8 (5) | 2.67 (12) | 158 (12) |
Symmetry codes: (i) −x+2, −y+1, −z+1; (ii) x+1, y, z; (iii) −x+1, −y+1, −z+1. |
Acknowledgements
We thank AstraZeneca R&D Charnwood for providing AR-C69457CC and studentship funding, and EPSRC for grant GR/N07462/01.
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