Introduction
Materials and methods
Chemicals
Sample preparation
GC–MS analysis
Electrospray ionization–mass spectrometry n
NMR spectroscopy
Fourier transform infrared, Raman and UV-VIS spectroscopies
Differential scanning calorimetry
X-ray spectroscopy
Results and discussion
GC–MS and ESI-MS n
1H and 13C NMR spectroscopy
Atom position | Carbon chemical shifts (ppm) | Proton chemical shifts (ppm) |
---|---|---|
1 | 195.31 | – |
2 | 62.31 | 5.26 (t, J = 5.3 Hz, 1H) |
3 | 31.98 | 1.78–1.87 (m, 1H); 1.90–1.98 (m, 1H) |
4 | 31.78 | 1.02–1.15 (m, 1H); 1.26–1.38 (m, 1H) |
5 | 14.10 | 0.78 (t, J = 7.3 Hz, 3H) |
6 | 17.54 | 2.56 (s, 3H) |
7 | 131.30 | – |
8, 12 | 132.37; 132.47 (J
C–C–C–F = 9.8 Hz) | 8.17 (m, 2H) |
9, 11 | 116.51; 116.53 (J
C–C–F = 22.1 Hz) | 7.45 (m, 2H) |
10 | 165.02; 167.55 (J
C–F = 254.4 Hz) | – |
N–H | – | 9.59 (bs, 2H) |
Atom position | Carbon chemical shifts (ppm) | Proton chemical shifts (ppm) |
---|---|---|
1 | 196.26 | – |
2 | 60.72 | 5.23 (t, J = 5.2 Hz, 1H) |
3 | 32.36 | 1.82–1.98 (m, 2H) |
4 | 17.70 | 1.01–1.34 (m, 1H); 1.22–1.37 (m, 1H) |
5 | 11.56 | 0.77 (t, J = 7.3 Hz, 3H) |
6 | 41.59 | 2.84–2.92 (m, 1H); 2.97–3.06 (m, 1H) |
7 | 14.14 | 1.27 (t, J = 7.2 Hz, 3H) |
8 | 132.17 | – |
9, 13 | 129.33 | 7.99 (d, J = 8.2 Hz, 2H) |
10, 12 | 130.18 | 7.41 (d, J = 8.0 Hz, 2H) |
11 | 145.93 | – |
14 | 21.73 | 2.87 (s, 3H) |
N–H | – | 9.14 (bs); 9.74 (bs) |
IR, Raman and UV-VIS spectra
Melting points
X-ray studies
Compound 1
| Compound 2
| |
---|---|---|
Molecular formula | C12H17FNOCl | C14H22NOCl |
Molecular weight | 245.71 | 255.78 |
Crystal system | Monoclinic | Monoclinic |
Space group |
P2
1
/c
|
P2
1
/n
|
Temperature (K) | 100 | 100 |
a (Å) | 11.9884 (2) | 7.1344 (2) |
b (Å) | 9.6621 (2) | 24.7843 (6) |
c (Å) | 10.6669 (2) | 8.0352 (2) |
α (o) | 90 | 90 |
β (o) | 90.944 (2) | 91.170 (2) |
γ (o) | 90 | 90 |
V (Å3) | 1235.41 (4) | 1420.50 (6) |
Z | 4 | 4 |
Dx (g cm−3) | 1.321 | 1.196 |
Absorption coeff. (mm−1) | 0.301 | 0.255 |
F (000) | 520 | 552 |
Crystal size (mm) | 0.12 × 0.07 × 0.03 | 0.10 × 0.07 × 0.03 |
Data collection and structure solution | ||
Data collected | 10,651 | 21,277 |
Independent reflections | 2524 | 2894 |
Observed reflections [I > 2σ(I)] | 2353 | 2766 |
R (int.) | 0.018 | 0.030 |
Completeness (%) | 99.9 | 99.9 |
T
max
/T
min
| 1.000/0.900 | 1.000/0.779 |
No. of parameters | 147 | 158 |
R1[I > 2σ(I)] | 0.025 | 0.035 |
wR2 (all data) | 0.069 | 0.083 |
S | 1.055 | 1.093 |
Largest difference peak and hole (eÅ−3) | 0.33, − 0.21 | 0.25, − 0.19 |