organic compounds
S)-3-methyl-2-[(naphthalen-1-ylsulfonyl)amino]butanoic acid
of (2aDepartment of Chemistry, Institute of Natural Sciences, University of Gujrat, Gujrat 50700, Pakistan, and bDepartment of Physics, University of Sargodha, Sargodha, Punjab, Pakistan
*Correspondence e-mail: dmntahir_uos@yahoo.com
The title compound, C15H17NO4S, was synthesized from L-valine and naphthalene-1-sulfonyl chloride. The hydrogen-bonded carboxylic acid groups form a catemer C(4) motif extending along [100]. The catemer structure is reinforced by a rather long N—H⋯O hydrogen bond, between the sulfamide N—H group and a carboxylic acid O atom [H⋯O = 2.52 (2) Å], and a C—H⋯O hydrogen bond.
Keywords: crystal structure; catemer; naphthalen-1-ylsulfonyl; L-valine; hydrogen bonding; π–π stacking interactions.
CCDC reference: 1058549
1. Related literature
For related structures, see: Aguilar-Castro et al. (2004); Arshad et al. (2012); Mubashar-ur-Rehman et al. (2013).
2. Experimental
2.1. Crystal data
|
2.3. Refinement
Data collection: APEX2 (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 2012) and PLATON.
Supporting information
CCDC reference: 1058549
https://doi.org/10.1107/S2056989015007057/gk2628sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989015007057/gk2628Isup2.hkl
Supporting information file. DOI: https://doi.org/10.1107/S2056989015007057/gk2628Isup3.cml
L-Valine (0.117 g, 1 mmol) and naphthalene-1-sulfonyl chloride (0.226 g, 1 mmol) were added to 30 ml of water. The reaction mixture was stirred at 323–328 K and pH of the reaction mixture was maintained at 8–9 by adding 1.0 M sodium bicarbonate solution. The heating was stopped when clear solution was obtained. After one hour 8 ml of 1.0 M HCl solution was added and white precipitate was formed. The precipitate was filtered and dried (yield: 70%; m.p. 421 K). White needles of the title compound were obtained after recrystallization from ethanol.
The coordinates of H-atom of carboxyl and N–H group were freely refined. The other H atoms were positioned geometrically (C–H = 0.93—0.96 Å) and refined as riding with Uiso(H) = xUeq(C, N, O), where x = 1.5 for hydroxy and x = 1.2 for all other H-atoms.
The title compound (Fig. 1) was synthesized for complexation and other studies.
The crystal structures of N-(p-toluenesulfonyl)-L-valine (Aguilar-Castro et al., 2004) and 2-benzenesulfonamido-3-methylbutyric acid (Arshad et al., 2012) have been reported which contain the L-valine as common moiety as in (I). The
of 2- (naphthalene-1-sulfonamido)-3-phenylpropanoic acid (Mubashar-ur-Rehman et al., 2013) has also been published which contains the naphthalene-1-sulfonamide group.In (I), the aminoacetato moiety A (O1/O2/C1/C2/N1) of L-valine and naphthalene ring B (C6–C15) are planar with r.m.s. deviation of 0.0468 and 0.0163 Å, respectively. The dihedral angle between A/B is 69.26 (9)°. The sulfonyl group C (S1/O3/O4) is oriented at a dihedtal angle of 59.9 (1)° with the parent naphthalene ring. The H-atoms of carboxyl, amido and of substituted aminoacetato moiety are involved in H-bondings (Table 1, Fig. 2). There exist two types of ring motifs R22(8) and R33(11). The R22(8) ring is formed due to C—H···O and N—H···O interactions. The R33(11) ring is created due to O—H···O and N—H···O interactions in which three carboxyl groups are involved. The R33(11) rings are connected successively along the a- axis, whereas, the R22(8) rings are connected to R33(11) rings alternatively, from opposite ends (Fig. 2).
For related structures, see: Aguilar-Castro et al. (2004); Arshad et al. (2012); Mubashar-ur-Rehman et al. (2013).
Data collection: APEX2 (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 2012) and PLATON (Spek, 2009).Fig. 1. View of the asymmetric unit of title compound with the atom numbering scheme. The displacement ellipsoids are drawn at the 50% probability level. H-atoms are shown as small circles of arbitrary radii. | |
Fig. 2. The partial packing (PLATON; Spek, 2009) which shows that molecules form one dimensional polymeric network with different hydrogen-bond ring motifs. H atoms not involved in hydrogen bonding are omitted for clarity. |
C15H17NO4S | Dx = 1.334 Mg m−3 |
Mr = 307.35 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, P212121 | Cell parameters from 2692 reflections |
a = 5.5006 (3) Å | θ = 3.1–27.0° |
b = 13.7638 (8) Å | µ = 0.23 mm−1 |
c = 20.2148 (14) Å | T = 296 K |
V = 1530.45 (16) Å3 | Needle, colorless |
Z = 4 | 0.38 × 0.22 × 0.20 mm |
F(000) = 648 |
Bruker Kappa APEXII CCD diffractometer | 3290 independent reflections |
Radiation source: fine-focus sealed tube | 2692 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.032 |
Detector resolution: 7.80 pixels mm-1 | θmax = 27.0°, θmin = 3.1° |
ω scans | h = −6→7 |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | k = −10→17 |
Tmin = 0.920, Tmax = 0.956 | l = −21→25 |
7706 measured reflections |
Refinement on F2 | Secondary atom site location: difference Fourier map |
Least-squares matrix: full | Hydrogen site location: inferred from neighbouring sites |
R[F2 > 2σ(F2)] = 0.045 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.095 | w = 1/[σ2(Fo2) + (0.0423P)2 + 0.0587P] where P = (Fo2 + 2Fc2)/3 |
S = 1.02 | (Δ/σ)max < 0.001 |
3290 reflections | Δρmax = 0.22 e Å−3 |
198 parameters | Δρmin = −0.24 e Å−3 |
0 restraints | Absolute structure: Flack x determined using 919 quotients [(I+)-(I-)]/[(I+)+(I-)] (Parsons et al., 2013) |
Primary atom site location: structure-invariant direct methods | Absolute structure parameter: −0.05 (5) |
C15H17NO4S | V = 1530.45 (16) Å3 |
Mr = 307.35 | Z = 4 |
Orthorhombic, P212121 | Mo Kα radiation |
a = 5.5006 (3) Å | µ = 0.23 mm−1 |
b = 13.7638 (8) Å | T = 296 K |
c = 20.2148 (14) Å | 0.38 × 0.22 × 0.20 mm |
Bruker Kappa APEXII CCD diffractometer | 3290 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2005) | 2692 reflections with I > 2σ(I) |
Tmin = 0.920, Tmax = 0.956 | Rint = 0.032 |
7706 measured reflections |
R[F2 > 2σ(F2)] = 0.045 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.095 | Δρmax = 0.22 e Å−3 |
S = 1.02 | Δρmin = −0.24 e Å−3 |
3290 reflections | Absolute structure: Flack x determined using 919 quotients [(I+)-(I-)]/[(I+)+(I-)] (Parsons et al., 2013) |
198 parameters | Absolute structure parameter: −0.05 (5) |
0 restraints |
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes. |
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger. |
x | y | z | Uiso*/Ueq | ||
S1 | 0.22778 (13) | 0.44851 (5) | 0.11598 (4) | 0.0360 (2) | |
O1 | 0.8107 (4) | 0.63127 (18) | −0.00511 (13) | 0.0473 (6) | |
H1 | 0.836 (7) | 0.692 (3) | −0.008 (2) | 0.071* | |
O2 | 0.4319 (5) | 0.67953 (17) | 0.01812 (14) | 0.0549 (7) | |
O3 | −0.0306 (4) | 0.43808 (16) | 0.11995 (12) | 0.0463 (6) | |
O4 | 0.3786 (4) | 0.36514 (16) | 0.12075 (12) | 0.0509 (6) | |
N1 | 0.2790 (4) | 0.49709 (18) | 0.04429 (12) | 0.0328 (6) | |
H1A | 0.180 (5) | 0.539 (2) | 0.0325 (16) | 0.039* | |
C1 | 0.5806 (6) | 0.6161 (2) | 0.01096 (15) | 0.0349 (7) | |
C2 | 0.5237 (5) | 0.5091 (2) | 0.01805 (15) | 0.0329 (7) | |
H2 | 0.6386 | 0.4809 | 0.0497 | 0.039* | |
C3 | 0.5555 (6) | 0.4565 (3) | −0.04864 (19) | 0.0510 (9) | |
H3 | 0.7206 | 0.4699 | −0.0644 | 0.061* | |
C4 | 0.3806 (8) | 0.4953 (4) | −0.0997 (2) | 0.0839 (15) | |
H4A | 0.4062 | 0.4623 | −0.1409 | 0.126* | |
H4B | 0.4077 | 0.5637 | −0.1056 | 0.126* | |
H4C | 0.2168 | 0.4847 | −0.0850 | 0.126* | |
C5 | 0.5323 (12) | 0.3476 (3) | −0.0401 (3) | 0.105 (2) | |
H5A | 0.6424 | 0.3261 | −0.0063 | 0.158* | |
H5B | 0.5711 | 0.3159 | −0.0811 | 0.158* | |
H5C | 0.3687 | 0.3318 | −0.0276 | 0.158* | |
C6 | 0.3219 (5) | 0.5300 (3) | 0.17904 (16) | 0.0410 (8) | |
C7 | 0.5143 (6) | 0.5024 (3) | 0.21720 (19) | 0.0572 (10) | |
H7 | 0.5961 | 0.4449 | 0.2077 | 0.069* | |
C8 | 0.5895 (8) | 0.5597 (4) | 0.2704 (2) | 0.0786 (15) | |
H8 | 0.7216 | 0.5402 | 0.2959 | 0.094* | |
C9 | 0.4737 (8) | 0.6422 (4) | 0.2851 (2) | 0.0762 (15) | |
H9 | 0.5258 | 0.6789 | 0.3211 | 0.091* | |
C10 | 0.2755 (8) | 0.6745 (3) | 0.24761 (19) | 0.0611 (11) | |
C11 | 0.1958 (6) | 0.6187 (2) | 0.19223 (17) | 0.0447 (8) | |
C12 | −0.0009 (7) | 0.6539 (3) | 0.1546 (2) | 0.0542 (10) | |
H12 | −0.0554 | 0.6185 | 0.1183 | 0.065* | |
C13 | −0.1127 (9) | 0.7393 (3) | 0.1708 (2) | 0.0769 (14) | |
H13 | −0.2395 | 0.7624 | 0.1447 | 0.092* | |
C14 | −0.0376 (13) | 0.7922 (3) | 0.2262 (3) | 0.0939 (19) | |
H14 | −0.1174 | 0.8495 | 0.2375 | 0.113* | |
C15 | 0.1496 (11) | 0.7608 (4) | 0.2635 (2) | 0.0829 (17) | |
H15 | 0.1967 | 0.7965 | 0.3003 | 0.099* |
U11 | U22 | U33 | U12 | U13 | U23 | |
S1 | 0.0350 (4) | 0.0333 (4) | 0.0397 (4) | −0.0026 (4) | 0.0009 (3) | 0.0062 (4) |
O1 | 0.0410 (14) | 0.0304 (12) | 0.0705 (17) | −0.0076 (11) | 0.0045 (11) | 0.0069 (13) |
O2 | 0.0536 (15) | 0.0311 (12) | 0.0799 (19) | 0.0074 (13) | 0.0100 (13) | 0.0071 (13) |
O3 | 0.0354 (11) | 0.0510 (13) | 0.0525 (14) | −0.0103 (10) | 0.0034 (10) | 0.0064 (13) |
O4 | 0.0541 (13) | 0.0363 (12) | 0.0622 (16) | 0.0081 (11) | 0.0020 (13) | 0.0133 (13) |
N1 | 0.0310 (13) | 0.0309 (13) | 0.0364 (14) | 0.0026 (12) | 0.0001 (11) | 0.0053 (11) |
C1 | 0.0378 (17) | 0.0315 (17) | 0.0354 (17) | 0.0015 (15) | −0.0021 (14) | 0.0008 (14) |
C2 | 0.0307 (16) | 0.0291 (16) | 0.0390 (18) | −0.0006 (13) | 0.0007 (13) | 0.0041 (15) |
C3 | 0.0468 (19) | 0.044 (2) | 0.062 (2) | −0.0076 (18) | 0.0161 (17) | −0.0155 (19) |
C4 | 0.087 (3) | 0.120 (4) | 0.045 (3) | −0.014 (3) | −0.002 (2) | −0.024 (3) |
C5 | 0.152 (5) | 0.045 (3) | 0.119 (5) | −0.008 (3) | 0.042 (4) | −0.031 (3) |
C6 | 0.0362 (17) | 0.052 (2) | 0.0351 (18) | −0.0101 (15) | 0.0041 (13) | 0.0047 (15) |
C7 | 0.041 (2) | 0.081 (3) | 0.050 (2) | −0.005 (2) | −0.0005 (16) | 0.004 (2) |
C8 | 0.054 (2) | 0.135 (5) | 0.048 (3) | −0.023 (3) | −0.010 (2) | 0.004 (3) |
C9 | 0.077 (3) | 0.111 (4) | 0.040 (2) | −0.040 (3) | −0.001 (2) | −0.011 (3) |
C10 | 0.076 (3) | 0.064 (2) | 0.044 (2) | −0.030 (3) | 0.018 (2) | −0.0049 (19) |
C11 | 0.053 (2) | 0.0432 (19) | 0.0378 (18) | −0.0135 (18) | 0.0101 (16) | −0.0006 (16) |
C12 | 0.068 (2) | 0.047 (2) | 0.047 (2) | 0.005 (2) | 0.0091 (19) | −0.0024 (19) |
C13 | 0.102 (3) | 0.058 (3) | 0.071 (3) | 0.023 (3) | 0.023 (3) | 0.004 (2) |
C14 | 0.157 (6) | 0.045 (3) | 0.079 (4) | 0.011 (3) | 0.047 (4) | −0.007 (3) |
C15 | 0.136 (5) | 0.056 (3) | 0.056 (3) | −0.027 (3) | 0.026 (3) | −0.020 (2) |
S1—O4 | 1.419 (2) | C5—H5C | 0.9600 |
S1—O3 | 1.431 (2) | C6—C7 | 1.364 (4) |
S1—N1 | 1.621 (3) | C6—C11 | 1.430 (5) |
S1—C6 | 1.775 (3) | C7—C8 | 1.397 (6) |
O1—C1 | 1.323 (4) | C7—H7 | 0.9300 |
O1—H1 | 0.85 (4) | C8—C9 | 1.335 (7) |
O2—C1 | 1.205 (4) | C8—H8 | 0.9300 |
N1—C2 | 1.456 (4) | C9—C10 | 1.401 (6) |
N1—H1A | 0.83 (2) | C9—H9 | 0.9300 |
C1—C2 | 1.513 (4) | C10—C15 | 1.412 (6) |
C2—C3 | 1.540 (5) | C10—C11 | 1.426 (5) |
C2—H2 | 0.9800 | C11—C12 | 1.408 (5) |
C3—C4 | 1.508 (6) | C12—C13 | 1.366 (5) |
C3—C5 | 1.514 (6) | C12—H12 | 0.9300 |
C3—H3 | 0.9800 | C13—C14 | 1.400 (7) |
C4—H4A | 0.9600 | C13—H13 | 0.9300 |
C4—H4B | 0.9600 | C14—C15 | 1.347 (7) |
C4—H4C | 0.9600 | C14—H14 | 0.9300 |
C5—H5A | 0.9600 | C15—H15 | 0.9300 |
C5—H5B | 0.9600 | ||
O4—S1—O3 | 119.71 (14) | C3—C5—H5C | 109.5 |
O4—S1—N1 | 107.01 (14) | H5A—C5—H5C | 109.5 |
O3—S1—N1 | 105.33 (14) | H5B—C5—H5C | 109.5 |
O4—S1—C6 | 106.96 (16) | C7—C6—C11 | 120.6 (3) |
O3—S1—C6 | 108.23 (15) | C7—C6—S1 | 117.2 (3) |
N1—S1—C6 | 109.32 (14) | C11—C6—S1 | 122.2 (2) |
C1—O1—H1 | 109 (3) | C6—C7—C8 | 120.5 (4) |
C2—N1—S1 | 122.2 (2) | C6—C7—H7 | 119.7 |
C2—N1—H1A | 115 (2) | C8—C7—H7 | 119.7 |
S1—N1—H1A | 115 (2) | C9—C8—C7 | 120.7 (4) |
O2—C1—O1 | 124.3 (3) | C9—C8—H8 | 119.7 |
O2—C1—C2 | 123.6 (3) | C7—C8—H8 | 119.7 |
O1—C1—C2 | 112.0 (3) | C8—C9—C10 | 121.4 (4) |
N1—C2—C1 | 109.6 (2) | C8—C9—H9 | 119.3 |
N1—C2—C3 | 111.8 (2) | C10—C9—H9 | 119.3 |
C1—C2—C3 | 110.5 (3) | C9—C10—C15 | 121.7 (5) |
N1—C2—H2 | 108.3 | C9—C10—C11 | 119.6 (4) |
C1—C2—H2 | 108.3 | C15—C10—C11 | 118.7 (4) |
C3—C2—H2 | 108.3 | C12—C11—C10 | 118.4 (4) |
C4—C3—C5 | 112.0 (4) | C12—C11—C6 | 124.5 (3) |
C4—C3—C2 | 111.1 (3) | C10—C11—C6 | 117.2 (3) |
C5—C3—C2 | 110.8 (3) | C13—C12—C11 | 120.8 (4) |
C4—C3—H3 | 107.5 | C13—C12—H12 | 119.6 |
C5—C3—H3 | 107.5 | C11—C12—H12 | 119.6 |
C2—C3—H3 | 107.5 | C12—C13—C14 | 120.4 (5) |
C3—C4—H4A | 109.5 | C12—C13—H13 | 119.8 |
C3—C4—H4B | 109.5 | C14—C13—H13 | 119.8 |
H4A—C4—H4B | 109.5 | C15—C14—C13 | 120.4 (5) |
C3—C4—H4C | 109.5 | C15—C14—H14 | 119.8 |
H4A—C4—H4C | 109.5 | C13—C14—H14 | 119.8 |
H4B—C4—H4C | 109.5 | C14—C15—C10 | 121.2 (5) |
C3—C5—H5A | 109.5 | C14—C15—H15 | 119.4 |
C3—C5—H5B | 109.5 | C10—C15—H15 | 119.4 |
H5A—C5—H5B | 109.5 | ||
O4—S1—N1—C2 | −44.2 (3) | S1—C6—C7—C8 | −176.0 (3) |
O3—S1—N1—C2 | −172.6 (2) | C6—C7—C8—C9 | 0.4 (6) |
C6—S1—N1—C2 | 71.3 (3) | C7—C8—C9—C10 | −0.6 (7) |
S1—N1—C2—C1 | −115.5 (3) | C8—C9—C10—C15 | 178.9 (4) |
S1—N1—C2—C3 | 121.6 (3) | C8—C9—C10—C11 | −0.4 (6) |
O2—C1—C2—N1 | −8.8 (4) | C9—C10—C11—C12 | −178.8 (3) |
O1—C1—C2—N1 | 172.4 (3) | C15—C10—C11—C12 | 1.9 (5) |
O2—C1—C2—C3 | 114.9 (3) | C9—C10—C11—C6 | 1.6 (5) |
O1—C1—C2—C3 | −64.0 (3) | C15—C10—C11—C6 | −177.8 (3) |
N1—C2—C3—C4 | 60.0 (4) | C7—C6—C11—C12 | 178.6 (3) |
C1—C2—C3—C4 | −62.4 (4) | S1—C6—C11—C12 | −4.7 (4) |
N1—C2—C3—C5 | −65.3 (4) | C7—C6—C11—C10 | −1.8 (5) |
C1—C2—C3—C5 | 172.3 (4) | S1—C6—C11—C10 | 174.9 (2) |
O4—S1—C6—C7 | 2.0 (3) | C10—C11—C12—C13 | 0.0 (5) |
O3—S1—C6—C7 | 132.3 (3) | C6—C11—C12—C13 | 179.6 (4) |
N1—S1—C6—C7 | −113.5 (3) | C11—C12—C13—C14 | −1.7 (6) |
O4—S1—C6—C11 | −174.8 (2) | C12—C13—C14—C15 | 1.6 (8) |
O3—S1—C6—C11 | −44.5 (3) | C13—C14—C15—C10 | 0.4 (8) |
N1—S1—C6—C11 | 69.7 (3) | C9—C10—C15—C14 | 178.6 (4) |
C11—C6—C7—C8 | 0.9 (5) | C11—C10—C15—C14 | −2.1 (7) |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2i | 0.85 (4) | 1.86 (4) | 2.701 (3) | 173 (4) |
N1—H1A···O1ii | 0.83 (2) | 2.52 (2) | 3.323 (3) | 166 (3) |
C2—H2···O3iii | 0.98 | 2.38 | 3.348 (4) | 169 |
Symmetry codes: (i) x+1/2, −y+3/2, −z; (ii) x−1, y, z; (iii) x+1, y, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1—H1···O2i | 0.85 (4) | 1.86 (4) | 2.701 (3) | 173 (4) |
N1—H1A···O1ii | 0.83 (2) | 2.52 (2) | 3.323 (3) | 166 (3) |
C2—H2···O3iii | 0.98 | 2.38 | 3.348 (4) | 168.6 |
Symmetry codes: (i) x+1/2, −y+3/2, −z; (ii) x−1, y, z; (iii) x+1, y, z. |
Acknowledgements
The authors acknowledge the provision of funds for the purchase of the diffractometer and encouragement by Dr Muhammad Akram Chaudhary, Vice Chancellor, University of Sargodha, Pakistan.
References
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The title compound (Fig. 1) was synthesized for complexation and other studies.
The crystal structures of N-(p-toluenesulfonyl)-L-valine (Aguilar-Castro et al., 2004) and 2-benzenesulfonamido-3-methylbutyric acid (Arshad et al., 2012) have been reported which contain the L-valine as common moiety as in (I). The crystal structure of 2- (naphthalene-1-sulfonamido)-3-phenylpropanoic acid (Mubashar-ur-Rehman et al., 2013) has also been published which contains the naphthalene-1-sulfonamide group.
In (I), the aminoacetato moiety A (O1/O2/C1/C2/N1) of L-valine and naphthalene ring B (C6–C15) are planar with r.m.s. deviation of 0.0468 and 0.0163 Å, respectively. The dihedral angle between A/B is 69.26 (9)°. The sulfonyl group C (S1/O3/O4) is oriented at a dihedtal angle of 59.9 (1)° with the parent naphthalene ring. The H-atoms of carboxyl, amido and of substituted aminoacetato moiety are involved in H-bondings (Table 1, Fig. 2). There exist two types of ring motifs R22(8) and R33(11). The R22(8) ring is formed due to C—H···O and N—H···O interactions. The R33(11) ring is created due to O—H···O and N—H···O interactions in which three carboxyl groups are involved. The R33(11) rings are connected successively along the a- axis, whereas, the R22(8) rings are connected to R33(11) rings alternatively, from opposite ends (Fig. 2).