organic compounds
Diphenyl (p-tolylamido)phosphate
aDepartment of Chemistry, Ferdowsi University of Mashhad, Mashhad 91779, Iran, and bDepartment of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, Iran
*Correspondence e-mail: mehrdad_pourayoubi@yahoo.com
The P atom in the title compound, C19H18NO3P, exhibits a distorted tetrahedral configuration while the N atom shows a planar coordination. In the crystal, intermolecular N—H⋯O hydrogen bonds form centrosymmetric dimers.
Related literature
The reaction of compounds having phosphorus-halide bonds with primary and secondary et al. (2003). For amidophosphoric acid (APEs), see: Gholivand et al. (2007); Ghadimi et al. (2007). For applications of APEs, see: Bao et al. (1993); Ghadimi et al. (2008); Nguyen & Kim (2008).
results in formation of phosphorus-nitrogen compounds, see: ChiversExperimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1998); cell SAINT-Plus (Bruker, 1998); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536810049354/ng5073sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536810049354/ng5073Isup2.hkl
To a solution of (C6H5O)2P(O)Cl in chloroform, a solution of p-toluidine and triethylamine (1:1:1 mole ratio) in chloroform was added at 273 K. After 4 h stirring, the solvent was removed and product was washed with distilled water and recrystallized from chloroform/n-heptane at room temperature. IR (KBr, cm-1): 3170.6 (NH), 3057.7, 2939.8, 2866.6, 2713.5, 2618.1, 2385.3, 1952.3, 1884.4, 1786.4, 1729.0, 1597.2, 1490.3, 1393.0, 1279.7, 1229.7, 1175.6, 1069.5, 974.8, 891.6, 819.2, 762.4, 681.6. Raman (cm-1): 3066.5, 3018.3, 2933.4, 1616.1, 1589.1, 1382.7, 1288.2, 1253.5, 1216.9, 1191.8, 1170.6, 1068.4, 1027.9, 1006.6, 941.1, 904.5, 837.0, 781.0, 759.8, 730.9, 636.4, 615.2, 590.1, 368.3, 333.6. 31P{1H} NMR (202.45 MHz, DMSO-d6, 300.0 K, H3PO4 external): -6.36 p.p.m. (s). 1H NMR (500.13 MHz, DMSO-d6, 300.0 K, TMS): 2.21 (s, 3H, CH3), 7.09 (s, 4H, Ar—H), 7.19–7.23 (m, 6H, Ar—H), 7.37–7.40 (m, 4H, Ar—H), 8.70 p.p.m. (d, 2J(P,H) = 10.6 Hz, 1H, NH). 13C NMR (125.75 MHz, DMSO-d6, 300.0 K, TMS): 20.16 (s, 1 C, CH3), 117.86 (d, 3J(P,C) = 7.7 Hz, 2 C, Cortho), 120.05 (d, 3J(P,C) = 4.8 Hz, 4 C, Cortho), 125.14 (s), 129.60 (s), 129.87 (s), 130.44 (s), 137.09 (s), 150.11 p.p.m. (d, 2J(P,C) = 6.3 Hz, 2 C, Cipso).
The hydrogen atom of NH group was found in difference Fourier synthesis. The H(C) atom positions were calculated. The H(N) atom was refined in isotropic approximation in riding model, the H(C) atoms were refined in isotropic approximation in riding model with the Uiso(H) parameters equal to 1.2 Ueq(Xi) or 1.5 Ueq(Cii), where U(Xi) are the equivalent thermal parameters of the NH and CH atoms and U(Cii) are the ones of the CH3 carbon atoms to which the corresponding H atoms are bonded.
The reaction of compounds having phosphorus-halide bonds with primary and secondary ═O)(N) or (O)P(═O)(N)(N) skeleton which may be obtained from some initial phosphorus substances such as (RO)P(O)Cl2 and (NR1R2)(RO)P(O)Cl (Gholivand et al., 2007; Ghadimi et al., 2007). APEs have attracted attention because of the flame retardancy for their bisphosphorus derivatives (Nguyen & Kim, 2008), chiral catalyst preparation (Bao et al., 1993) and biological properties (Ghadimi et al., 2008).
results in formation of phosphorus-nitrogen compounds (Chivers et al., 2003). Amidophosphoric acid (APEs), a family of these compounds, contain an (O)(O)P(Here, we report on the synthesis and single-crystal X-ray determination of title APE compound (Fig. 1); single crystals were obtained from CHCl3/n-C7H16 at r. t.
The phosphorus atom has a distorted tetrahedral configuration with the bond angles in the range of 94.65 (7)° [O(2)–P(1)–O(3)] to 117.14 (8)° [O(1)–P(1)–O(2)]. In
the H-bonded centrosymmetric dimer is formed via an intermolecular PO···HN hydrogen bond (N···O = 2.840 (3) Å). A fragment of packing showing the hydrogen bond is presented in Fig. 2.The reaction of compounds having phosphorus-halide bonds with primary and secondary
results in formation of phosphorus-nitrogen compounds, see: Chivers et al. (2003). For amidophosphoric acid (APEs), see: Gholivand et al. (2007); Ghadimi et al. (2007). For applications of APEs, see: Bao et al. (1993); Ghadimi et al. (2008); Nguyen & Kim (2008).Data collection: SMART (Bruker, 1998); cell
SAINT-Plus (Bruker, 1998); data reduction: SAINT-Plus (Bruker, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).C19H18NO3P | Z = 2 |
Mr = 339.31 | F(000) = 356 |
Triclinic, P1 | Dx = 1.312 Mg m−3 |
a = 9.7406 (10) Å | Mo Kα radiation, λ = 0.71073 Å |
b = 9.9653 (10) Å | Cell parameters from 948 reflections |
c = 11.1788 (12) Å | θ = 3–29° |
α = 96.337 (2)° | µ = 0.18 mm−1 |
β = 109.303 (2)° | T = 120 K |
γ = 117.827 (2)° | Prism, colorless |
V = 858.93 (15) Å3 | 0.24 × 0.21 × 0.11 mm |
Bruker SMART 1000 CCD area-detector diffractometer | 3744 independent reflections |
Radiation source: fine-focus sealed tube | 3232 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.020 |
phi and ω scans | θmax = 27.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −12→12 |
Tmin = 0.980, Tmax = 0.989 | k = −12→12 |
8165 measured reflections | l = −14→14 |
Refinement on F2 | Primary atom site location: structure-invariant direct methods |
Least-squares matrix: full | Secondary atom site location: difference Fourier map |
R[F2 > 2σ(F2)] = 0.045 | Hydrogen site location: mixed |
wR(F2) = 0.099 | H-atom parameters constrained |
S = 1.01 | w = 1/[σ2(Fo2) + (0.010P)2 + 1.4P] where P = (Fo2 + 2Fc2)/3 |
3744 reflections | (Δ/σ)max < 0.001 |
218 parameters | Δρmax = 0.31 e Å−3 |
0 restraints | Δρmin = −0.57 e Å−3 |
C19H18NO3P | γ = 117.827 (2)° |
Mr = 339.31 | V = 858.93 (15) Å3 |
Triclinic, P1 | Z = 2 |
a = 9.7406 (10) Å | Mo Kα radiation |
b = 9.9653 (10) Å | µ = 0.18 mm−1 |
c = 11.1788 (12) Å | T = 120 K |
α = 96.337 (2)° | 0.24 × 0.21 × 0.11 mm |
β = 109.303 (2)° |
Bruker SMART 1000 CCD area-detector diffractometer | 3744 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 3232 reflections with I > 2σ(I) |
Tmin = 0.980, Tmax = 0.989 | Rint = 0.020 |
8165 measured reflections |
R[F2 > 2σ(F2)] = 0.045 | 0 restraints |
wR(F2) = 0.099 | H-atom parameters constrained |
S = 1.01 | Δρmax = 0.31 e Å−3 |
3744 reflections | Δρmin = −0.57 e Å−3 |
218 parameters |
Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s 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 | ||
P1 | 0.30226 (6) | 0.32453 (5) | 0.30029 (5) | 0.01976 (12) | |
O1 | 0.26650 (17) | 0.38136 (15) | 0.40642 (13) | 0.0232 (3) | |
O2 | 0.16664 (16) | 0.14657 (15) | 0.20459 (12) | 0.0212 (3) | |
O3 | 0.28250 (16) | 0.40203 (15) | 0.18341 (13) | 0.0216 (3) | |
N1 | 0.4912 (2) | 0.34721 (19) | 0.36132 (15) | 0.0214 (3) | |
H1 | 0.5535 | 0.4125 | 0.4324 | 0.026* | |
C1 | 0.1005 (2) | 0.0096 (2) | 0.24317 (19) | 0.0203 (4) | |
C2 | −0.0075 (2) | −0.1338 (2) | 0.1388 (2) | 0.0235 (4) | |
H2A | −0.0313 | −0.1345 | 0.0492 | 0.028* | |
C3 | −0.0801 (3) | −0.2761 (2) | 0.1673 (2) | 0.0296 (4) | |
H3A | −0.1534 | −0.3750 | 0.0968 | 0.036* | |
C4 | −0.0461 (3) | −0.2743 (3) | 0.2985 (2) | 0.0319 (5) | |
H4A | −0.0961 | −0.3719 | 0.3179 | 0.038* | |
C5 | 0.0611 (3) | −0.1297 (3) | 0.4011 (2) | 0.0325 (5) | |
H5A | 0.0837 | −0.1289 | 0.4907 | 0.039* | |
C6 | 0.1362 (3) | 0.0147 (2) | 0.3750 (2) | 0.0276 (4) | |
H6A | 0.2097 | 0.1137 | 0.4454 | 0.033* | |
C7 | 0.3697 (2) | 0.5708 (2) | 0.22208 (19) | 0.0227 (4) | |
C8 | 0.2885 (3) | 0.6432 (2) | 0.2520 (2) | 0.0300 (4) | |
H8A | 0.1772 | 0.5812 | 0.2487 | 0.036* | |
C9 | 0.3736 (3) | 0.8088 (3) | 0.2869 (2) | 0.0347 (5) | |
H9A | 0.3204 | 0.8612 | 0.3081 | 0.042* | |
C10 | 0.5357 (3) | 0.8980 (2) | 0.2909 (2) | 0.0335 (5) | |
H10A | 0.5929 | 1.0112 | 0.3143 | 0.040* | |
C11 | 0.6148 (3) | 0.8228 (3) | 0.2610 (2) | 0.0327 (5) | |
H11A | 0.7263 | 0.8845 | 0.2646 | 0.039* | |
C12 | 0.5309 (3) | 0.6567 (2) | 0.2257 (2) | 0.0272 (4) | |
H12A | 0.5838 | 0.6039 | 0.2046 | 0.033* | |
C13 | 0.5718 (2) | 0.3089 (2) | 0.29081 (18) | 0.0204 (4) | |
C14 | 0.7373 (2) | 0.3403 (2) | 0.36440 (19) | 0.0216 (4) | |
H14A | 0.7917 | 0.3854 | 0.4590 | 0.026* | |
C15 | 0.8219 (2) | 0.3056 (2) | 0.2994 (2) | 0.0238 (4) | |
H15A | 0.9342 | 0.3281 | 0.3504 | 0.029* | |
C16 | 0.7450 (2) | 0.2383 (2) | 0.1608 (2) | 0.0255 (4) | |
C17 | 0.5803 (3) | 0.2073 (3) | 0.0896 (2) | 0.0294 (4) | |
H17A | 0.5251 | 0.1608 | −0.0049 | 0.035* | |
C18 | 0.4949 (3) | 0.2425 (3) | 0.1528 (2) | 0.0275 (4) | |
H18A | 0.3832 | 0.2212 | 0.1015 | 0.033* | |
C19 | 0.8337 (3) | 0.1978 (3) | 0.0886 (2) | 0.0363 (5) | |
H19A | 0.7571 | 0.1485 | −0.0074 | 0.054* | |
H19B | 0.8614 | 0.1228 | 0.1227 | 0.054* | |
H19C | 0.9401 | 0.2957 | 0.1035 | 0.054* |
U11 | U22 | U33 | U12 | U13 | U23 | |
P1 | 0.0190 (2) | 0.0172 (2) | 0.0197 (2) | 0.00924 (19) | 0.00640 (18) | 0.00282 (18) |
O1 | 0.0218 (6) | 0.0218 (7) | 0.0239 (7) | 0.0107 (6) | 0.0102 (5) | 0.0030 (5) |
O2 | 0.0227 (6) | 0.0166 (6) | 0.0198 (6) | 0.0095 (5) | 0.0069 (5) | 0.0035 (5) |
O3 | 0.0215 (6) | 0.0166 (6) | 0.0225 (6) | 0.0093 (5) | 0.0070 (5) | 0.0038 (5) |
N1 | 0.0191 (7) | 0.0228 (8) | 0.0174 (7) | 0.0118 (7) | 0.0039 (6) | 0.0000 (6) |
C1 | 0.0181 (8) | 0.0185 (8) | 0.0253 (9) | 0.0105 (7) | 0.0094 (7) | 0.0068 (7) |
C2 | 0.0224 (9) | 0.0226 (9) | 0.0250 (9) | 0.0123 (8) | 0.0101 (8) | 0.0051 (8) |
C3 | 0.0259 (10) | 0.0201 (9) | 0.0355 (11) | 0.0099 (8) | 0.0108 (9) | 0.0035 (8) |
C4 | 0.0300 (11) | 0.0246 (10) | 0.0435 (12) | 0.0140 (9) | 0.0178 (10) | 0.0162 (9) |
C5 | 0.0370 (12) | 0.0332 (11) | 0.0314 (11) | 0.0197 (10) | 0.0166 (9) | 0.0159 (9) |
C6 | 0.0310 (10) | 0.0241 (10) | 0.0236 (10) | 0.0140 (9) | 0.0090 (8) | 0.0057 (8) |
C7 | 0.0240 (9) | 0.0174 (9) | 0.0229 (9) | 0.0105 (8) | 0.0071 (7) | 0.0060 (7) |
C8 | 0.0246 (10) | 0.0244 (10) | 0.0399 (12) | 0.0135 (8) | 0.0129 (9) | 0.0090 (9) |
C9 | 0.0365 (12) | 0.0258 (10) | 0.0448 (13) | 0.0208 (10) | 0.0152 (10) | 0.0100 (9) |
C10 | 0.0350 (11) | 0.0187 (9) | 0.0351 (11) | 0.0108 (9) | 0.0079 (9) | 0.0092 (8) |
C11 | 0.0270 (10) | 0.0268 (10) | 0.0369 (12) | 0.0093 (9) | 0.0128 (9) | 0.0132 (9) |
C12 | 0.0264 (10) | 0.0252 (10) | 0.0300 (10) | 0.0136 (8) | 0.0122 (8) | 0.0098 (8) |
C13 | 0.0198 (9) | 0.0176 (8) | 0.0229 (9) | 0.0105 (7) | 0.0082 (7) | 0.0048 (7) |
C14 | 0.0193 (9) | 0.0165 (8) | 0.0215 (9) | 0.0077 (7) | 0.0044 (7) | 0.0038 (7) |
C15 | 0.0166 (8) | 0.0198 (9) | 0.0300 (10) | 0.0086 (7) | 0.0068 (8) | 0.0067 (8) |
C16 | 0.0221 (9) | 0.0235 (9) | 0.0303 (10) | 0.0126 (8) | 0.0112 (8) | 0.0054 (8) |
C17 | 0.0286 (10) | 0.0363 (11) | 0.0223 (10) | 0.0200 (9) | 0.0082 (8) | 0.0033 (8) |
C18 | 0.0228 (9) | 0.0351 (11) | 0.0240 (10) | 0.0188 (9) | 0.0061 (8) | 0.0037 (8) |
C19 | 0.0263 (10) | 0.0434 (13) | 0.0379 (12) | 0.0191 (10) | 0.0148 (9) | 0.0040 (10) |
P1—O1 | 1.4691 (14) | C8—H8A | 0.9500 |
P1—O2 | 1.5793 (13) | C9—C10 | 1.385 (3) |
P1—O3 | 1.5926 (14) | C9—H9A | 0.9500 |
P1—N1 | 1.6279 (16) | C10—C11 | 1.386 (3) |
O2—C1 | 1.399 (2) | C10—H10A | 0.9500 |
O3—C7 | 1.414 (2) | C11—C12 | 1.394 (3) |
N1—C13 | 1.417 (2) | C11—H11A | 0.9500 |
N1—H1 | 0.7881 | C12—H12A | 0.9500 |
C1—C6 | 1.387 (3) | C13—C18 | 1.388 (3) |
C1—C2 | 1.388 (3) | C13—C14 | 1.403 (3) |
C2—C3 | 1.387 (3) | C14—C15 | 1.391 (3) |
C2—H2A | 0.9500 | C14—H14A | 0.9500 |
C3—C4 | 1.390 (3) | C15—C16 | 1.395 (3) |
C3—H3A | 0.9500 | C15—H15A | 0.9500 |
C4—C5 | 1.386 (3) | C16—C17 | 1.393 (3) |
C4—H4A | 0.9500 | C16—C19 | 1.509 (3) |
C5—C6 | 1.393 (3) | C17—C18 | 1.387 (3) |
C5—H5A | 0.9500 | C17—H17A | 0.9500 |
C6—H6A | 0.9500 | C18—H18A | 0.9500 |
C7—C8 | 1.383 (3) | C19—H19A | 0.9800 |
C7—C12 | 1.377 (3) | C19—H19B | 0.9800 |
C8—C9 | 1.389 (3) | C19—H19C | 0.9800 |
O1—P1—O2 | 117.14 (8) | C10—C9—H9A | 119.8 |
O1—P1—O3 | 114.32 (8) | C8—C9—H9A | 119.8 |
O2—P1—O3 | 94.65 (7) | C11—C10—C9 | 120.22 (19) |
O1—P1—N1 | 111.29 (8) | C11—C10—H10A | 119.9 |
O2—P1—N1 | 107.89 (8) | C9—C10—H10A | 119.9 |
O3—P1—N1 | 110.35 (8) | C10—C11—C12 | 120.1 (2) |
C1—O2—P1 | 126.66 (12) | C10—C11—H11A | 119.9 |
C7—O3—P1 | 116.80 (11) | C12—C11—H11A | 119.9 |
C13—N1—P1 | 127.92 (13) | C7—C12—C11 | 118.45 (19) |
C13—N1—H1 | 115.8 | C7—C12—H12A | 120.8 |
P1—N1—H1 | 112.7 | C11—C12—H12A | 120.8 |
C6—C1—C2 | 121.82 (18) | C18—C13—C14 | 118.81 (17) |
C6—C1—O2 | 123.22 (16) | C18—C13—N1 | 123.00 (16) |
C2—C1—O2 | 114.95 (16) | C14—C13—N1 | 118.18 (16) |
C3—C2—C1 | 119.12 (18) | C15—C14—C13 | 120.21 (17) |
C3—C2—H2A | 120.4 | C15—C14—H14A | 119.9 |
C1—C2—H2A | 120.4 | C13—C14—H14A | 119.9 |
C4—C3—C2 | 120.23 (19) | C14—C15—C16 | 121.26 (17) |
C4—C3—H3A | 119.9 | C14—C15—H15A | 119.4 |
C2—C3—H3A | 119.9 | C16—C15—H15A | 119.4 |
C3—C4—C5 | 119.69 (19) | C17—C16—C15 | 117.64 (18) |
C3—C4—H4A | 120.2 | C17—C16—C19 | 120.30 (19) |
C5—C4—H4A | 120.2 | C15—C16—C19 | 122.06 (18) |
C6—C5—C4 | 121.1 (2) | C18—C17—C16 | 121.78 (19) |
C6—C5—H5A | 119.5 | C18—C17—H17A | 119.1 |
C4—C5—H5A | 119.5 | C16—C17—H17A | 119.1 |
C1—C6—C5 | 118.05 (19) | C17—C18—C13 | 120.29 (18) |
C1—C6—H6A | 121.0 | C17—C18—H18A | 119.9 |
C5—C6—H6A | 121.0 | C13—C18—H18A | 119.9 |
C8—C7—C12 | 122.44 (18) | C16—C19—H19A | 109.5 |
C8—C7—O3 | 118.89 (17) | C16—C19—H19B | 109.5 |
C12—C7—O3 | 118.65 (17) | H19A—C19—H19B | 109.5 |
C7—C8—C9 | 118.42 (19) | C16—C19—H19C | 109.5 |
C7—C8—H8A | 120.8 | H19A—C19—H19C | 109.5 |
C9—C8—H8A | 120.8 | H19B—C19—H19C | 109.5 |
C10—C9—C8 | 120.3 (2) | ||
O1—P1—O2—C1 | −50.89 (16) | C12—C7—C8—C9 | 0.0 (3) |
O3—P1—O2—C1 | −171.29 (14) | O3—C7—C8—C9 | −178.54 (18) |
N1—P1—O2—C1 | 75.58 (15) | C7—C8—C9—C10 | 0.2 (3) |
O1—P1—O3—C7 | 50.54 (15) | C8—C9—C10—C11 | −0.4 (3) |
O2—P1—O3—C7 | 173.16 (13) | C9—C10—C11—C12 | 0.5 (3) |
N1—P1—O3—C7 | −75.81 (14) | C8—C7—C12—C11 | 0.0 (3) |
O1—P1—N1—C13 | −179.07 (15) | O3—C7—C12—C11 | 178.59 (17) |
O2—P1—N1—C13 | 51.11 (18) | C10—C11—C12—C7 | −0.3 (3) |
O3—P1—N1—C13 | −51.04 (18) | P1—N1—C13—C18 | −0.3 (3) |
P1—O2—C1—C6 | 5.8 (3) | P1—N1—C13—C14 | 179.39 (14) |
P1—O2—C1—C2 | −175.33 (13) | C18—C13—C14—C15 | 0.1 (3) |
C6—C1—C2—C3 | −0.8 (3) | N1—C13—C14—C15 | −179.59 (17) |
O2—C1—C2—C3 | −179.63 (17) | C13—C14—C15—C16 | −0.4 (3) |
C1—C2—C3—C4 | 0.6 (3) | C14—C15—C16—C17 | 0.1 (3) |
C2—C3—C4—C5 | −0.1 (3) | C14—C15—C16—C19 | −179.19 (19) |
C3—C4—C5—C6 | −0.2 (3) | C15—C16—C17—C18 | 0.4 (3) |
C2—C1—C6—C5 | 0.4 (3) | C19—C16—C17—C18 | 179.8 (2) |
O2—C1—C6—C5 | 179.22 (18) | C16—C17—C18—C13 | −0.7 (3) |
C4—C5—C6—C1 | 0.0 (3) | C14—C13—C18—C17 | 0.4 (3) |
P1—O3—C7—C8 | −86.63 (19) | N1—C13—C18—C17 | −179.86 (19) |
P1—O3—C7—C12 | 94.78 (19) |
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1i | 0.79 | 2.07 | 2.840 (3) | 167 |
Symmetry code: (i) −x+1, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | C19H18NO3P |
Mr | 339.31 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 120 |
a, b, c (Å) | 9.7406 (10), 9.9653 (10), 11.1788 (12) |
α, β, γ (°) | 96.337 (2), 109.303 (2), 117.827 (2) |
V (Å3) | 858.93 (15) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.18 |
Crystal size (mm) | 0.24 × 0.21 × 0.11 |
Data collection | |
Diffractometer | Bruker SMART 1000 CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.980, 0.989 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8165, 3744, 3232 |
Rint | 0.020 |
(sin θ/λ)max (Å−1) | 0.639 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.045, 0.099, 1.01 |
No. of reflections | 3744 |
No. of parameters | 218 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.31, −0.57 |
Computer programs: SMART (Bruker, 1998), SAINT-Plus (Bruker, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N1—H1···O1i | 0.79 | 2.07 | 2.840 (3) | 167 |
Symmetry code: (i) −x+1, −y+1, −z+1. |
Acknowledgements
Support of this investigation by Ferdowsi University of Mashhad is gratefully acknowledged.
References
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This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
The reaction of compounds having phosphorus-halide bonds with primary and secondary amines results in formation of phosphorus-nitrogen compounds (Chivers et al., 2003). Amidophosphoric acid esters (APEs), a family of these compounds, contain an (O)(O)P(═O)(N) or (O)P(═O)(N)(N) skeleton which may be obtained from some initial phosphorus substances such as (RO)P(O)Cl2 and (NR1R2)(RO)P(O)Cl (Gholivand et al., 2007; Ghadimi et al., 2007). APEs have attracted attention because of the flame retardancy for their bisphosphorus derivatives (Nguyen & Kim, 2008), chiral catalyst preparation (Bao et al., 1993) and biological properties (Ghadimi et al., 2008).
Here, we report on the synthesis and single-crystal X-ray determination of title APE compound (Fig. 1); single crystals were obtained from CHCl3/n-C7H16 at r. t.
The phosphorus atom has a distorted tetrahedral configuration with the bond angles in the range of 94.65 (7)° [O(2)–P(1)–O(3)] to 117.14 (8)° [O(1)–P(1)–O(2)]. In crystal lattice, the H-bonded centrosymmetric dimer is formed via an intermolecular PO···HN hydrogen bond (N···O = 2.840 (3) Å). A fragment of unit cell packing showing the hydrogen bond is presented in Fig. 2.