The title compound, C
8H
12N
+·C
23H
36NO
3−·H
2O, has one molecule of
N-tetradecanoyl-
L-phenylalanine and one molecule of (
R)-1-phenylethylamine as a diastereoisomeric salt, and a water molecule in the asymmetric unit. In the crystal structure, the packing of the molecules is stabilized by N—H
O and O—H
O hydrogen bonds involving the amide, ammonium and carboxylate groups, and the solvent water molecule.
Supporting information
CCDC reference: 296585
Key indicators
- Single-crystal X-ray study
- T = 123 K
- Mean (C-C) = 0.005 Å
- R factor = 0.068
- wR factor = 0.151
- Data-to-parameter ratio = 10.7
checkCIF/PLATON results
No syntax errors found
Alert level C
PLAT029_ALERT_3_C _diffrn_measured_fraction_theta_full Low ....... 0.97
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ .... ?
PLAT340_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ... 5
PLAT355_ALERT_3_C Long O-H Bond (0.82A) O4 - H50 ... 1.05 Ang.
Alert level G
REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is
correct. If it is not, please give the correct count in the
_publ_section_exptl_refinement section of the submitted CIF.
From the CIF: _diffrn_reflns_theta_max 27.50
From the CIF: _reflns_number_total 3774
Count of symmetry unique reflns 3905
Completeness (_total/calc) 96.65%
TEST3: Check Friedels for noncentro structure
Estimate of Friedel pairs measured 0
Fraction of Friedel pairs measured 0.000
Are heavy atom types Z>Si present no
0 ALERT level A = In general: serious problem
0 ALERT level B = Potentially serious problem
4 ALERT level C = Check and explain
1 ALERT level G = General alerts; check
1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
0 ALERT type 2 Indicator that the structure model may be wrong or deficient
3 ALERT type 3 Indicator that the structure quality may be low
1 ALERT type 4 Improvement, methodology, query or suggestion
N-tetradecanoyl-l-phenylalanine was prepared by the reaction of l-phenylalanine with tetradecanoyl chloride as described previously (Miyagishi & Nishida, 1978) and was recrystallized from an acetone/methanol solution three times. The purity was checked by HPLC and DSC and by observing no minimum on the surface tension vs concentration curves at 298.15 K. The title compound was obtained by neutralization of N-tetradecanoyl-l-phenylalanine with equimolar of (R)-1-phenylethylamine in methanol. After evaporation of the solvent, the residue was recrystallized from a methanol/water solution to obtain suitable crystals for X-ray diffraction (m.p. 374–376 K).
H atoms involved in hydrogen bonds were located in a difference map, and their positional parameters were refined. The Uiso(H) values were set at 1.2Ueq(N or O). Other H atoms were included in calculated positions using a riding-model approximation, with C—H distances in the range 0.93–0.97 Å and Uiso(H) = 1.2Ueq(C). Due to the absence of any significant anomalous scatterers in the crystal, Friedel pairs were merged before the final refinement. The absolute configuration has been assigned on the basis of the known configuration of the reagents.
Data collection: CrystalClear (Rigaku, 2000); cell refinement: CrystalClear; data reduction: TEXSAN (Molecular Structure Corporation, 2000); program(s) used to solve structure: MITHRIL90 (Gilmore, 1990); program(s) used to refine structure: SHELXL93 (Sheldrick, 1993); molecular graphics: ORTEPIII (Johnson & Burnett, 1996) and
Mercury (Bruno et al., 2002); software used to prepare material for publication: TEXSAN.
(
R)-1-Phenylethylammonium
N-tetradecanoyl-
L-phenylalaninate monohydrate
top
Crystal data top
C8H12N+·C23H36NO3−·H2O | F(000) = 564 |
Mr = 514.73 | Dx = 1.126 Mg m−3 |
Monoclinic, P21 | Mo Kα radiation, λ = 0.7107 Å |
Hall symbol: P 2yb | Cell parameters from 5442 reflections |
a = 10.920 (4) Å | θ = 7.2–27.5° |
b = 4.9902 (17) Å | µ = 0.07 mm−1 |
c = 27.926 (10) Å | T = 123 K |
β = 94.085 (8)° | Plate, colorless |
V = 1517.9 (9) Å3 | 0.50 × 0.20 × 0.10 mm |
Z = 2 | |
Data collection top
Rigaku/MSC Mercury CCD diffractometer | Rint = 0.100 |
Detector resolution: 14.63 pixels mm-1 | θmax = 27.5° |
ω scans | h = −13→14 |
16351 measured reflections | k = −6→6 |
3774 independent reflections | l = −35→35 |
2920 reflections with I > 2σ(I) | |
Refinement top
Refinement on F2 | H atoms treated by a mixture of independent and constrained refinement |
R[F2 > 2σ(F2)] = 0.068 | w = 1/[σ2(Fo2) + (0.0384P)2] where P = (Fo2 + 2Fc2)/3 |
wR(F2) = 0.151 | (Δ/σ)max < 0.001 |
S = 1.06 | Δρmax = 0.20 e Å−3 |
3774 reflections | Δρmin = −0.23 e Å−3 |
352 parameters | |
Crystal data top
C8H12N+·C23H36NO3−·H2O | V = 1517.9 (9) Å3 |
Mr = 514.73 | Z = 2 |
Monoclinic, P21 | Mo Kα radiation |
a = 10.920 (4) Å | µ = 0.07 mm−1 |
b = 4.9902 (17) Å | T = 123 K |
c = 27.926 (10) Å | 0.50 × 0.20 × 0.10 mm |
β = 94.085 (8)° | |
Data collection top
Rigaku/MSC Mercury CCD diffractometer | 2920 reflections with I > 2σ(I) |
16351 measured reflections | Rint = 0.100 |
3774 independent reflections | |
Refinement top
R[F2 > 2σ(F2)] = 0.068 | 352 parameters |
wR(F2) = 0.151 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.06 | Δρmax = 0.20 e Å−3 |
3774 reflections | Δρmin = −0.23 e Å−3 |
Special details top
Refinement. Refinement using reflections with F2 > −10.0 σ(F2). The weighted R-factor (wR) and goodness of fit (S) are based on F2. R-factor (gt) are based on F. The threshold expression of F2 > 2.0 σ(F2) is used only for calculating R-factor (gt). |
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top | x | y | z | Uiso*/Ueq | |
O1 | 0.2957 (2) | 1.0792 (7) | 0.41845 (10) | 0.0360 (7) | |
O2 | 0.4593 (2) | 0.9265 (5) | 0.38397 (8) | 0.0217 (5) | |
O3 | 0.3805 (2) | 1.2925 (5) | 0.28462 (10) | 0.0275 (6) | |
O4 | 0.5634 (3) | 0.5884 (6) | 0.49885 (10) | 0.0270 (6) | |
N1 | 0.3314 (3) | 0.8609 (6) | 0.29735 (10) | 0.0196 (6) | |
N2 | 0.4315 (3) | 0.9376 (7) | 0.59795 (12) | 0.0210 (6) | |
C1 | 0.3455 (3) | 0.9770 (7) | 0.38413 (13) | 0.0211 (7) | |
C2 | 0.2615 (3) | 0.9225 (7) | 0.33811 (12) | 0.0187 (7) | |
C3 | 0.1674 (3) | 0.7025 (8) | 0.34547 (12) | 0.0219 (7) | |
C4 | 0.0711 (3) | 0.6899 (8) | 0.30375 (13) | 0.0236 (7) | |
C5 | −0.0296 (3) | 0.8655 (8) | 0.30198 (14) | 0.0303 (9) | |
C6 | −0.1155 (4) | 0.8644 (9) | 0.26247 (16) | 0.0360 (10) | |
C7 | −0.1032 (4) | 0.6868 (10) | 0.22508 (15) | 0.0350 (9) | |
C8 | −0.0052 (4) | 0.5129 (9) | 0.22649 (15) | 0.0341 (9) | |
C9 | 0.0817 (4) | 0.5123 (8) | 0.26557 (14) | 0.0297 (9) | |
C10 | 0.3875 (3) | 1.0526 (7) | 0.27413 (13) | 0.0216 (7) | |
C11 | 0.4583 (3) | 0.9621 (8) | 0.23226 (13) | 0.0251 (8) | |
C12 | 0.3802 (4) | 0.8076 (8) | 0.19401 (13) | 0.0252 (8) | |
C13 | 0.2637 (3) | 0.9523 (8) | 0.17555 (12) | 0.0236 (7) | |
C14 | 0.1933 (4) | 0.8035 (8) | 0.13483 (13) | 0.0265 (8) | |
C15 | 0.0744 (3) | 0.9407 (8) | 0.11627 (13) | 0.0242 (7) | |
C16 | 0.0052 (4) | 0.7932 (8) | 0.07511 (13) | 0.0275 (8) | |
C17 | −0.1135 (4) | 0.9302 (8) | 0.05686 (13) | 0.0272 (8) | |
C18 | −0.1797 (4) | 0.7899 (8) | 0.01355 (13) | 0.0261 (8) | |
C19 | −0.2992 (3) | 0.9248 (8) | −0.00424 (13) | 0.0250 (7) | |
C20 | −0.3640 (3) | 0.7883 (8) | −0.04777 (12) | 0.0246 (8) | |
C21 | −0.4838 (3) | 0.9219 (8) | −0.06560 (13) | 0.0269 (8) | |
C22 | −0.5478 (4) | 0.7807 (8) | −0.10908 (13) | 0.0307 (9) | |
C23 | −0.6651 (4) | 0.9180 (9) | −0.12842 (17) | 0.0390 (10) | |
C24 | 0.3100 (3) | 0.9530 (8) | 0.61958 (13) | 0.0212 (7) | |
C25 | 0.2150 (3) | 0.7917 (7) | 0.59119 (12) | 0.0210 (7) | |
C26 | 0.0915 (3) | 0.8420 (8) | 0.59840 (13) | 0.0249 (8) | |
C27 | −0.0017 (3) | 0.6921 (9) | 0.57536 (14) | 0.0272 (8) | |
C28 | 0.0271 (3) | 0.4880 (8) | 0.54484 (14) | 0.0267 (8) | |
C29 | 0.1480 (3) | 0.4365 (8) | 0.53622 (14) | 0.0258 (8) | |
C30 | 0.2418 (3) | 0.5884 (8) | 0.55977 (13) | 0.0235 (8) | |
C31 | 0.3274 (4) | 0.8684 (9) | 0.67217 (14) | 0.0325 (10) | |
H1 | 0.347 (4) | 0.681 (9) | 0.2894 (14) | 0.0233* | |
H2 | 0.2173 | 1.0789 | 0.3307 | 0.0225* | |
H3 | 0.2082 | 0.5310 | 0.3483 | 0.0257* | |
H4 | 0.1280 | 0.7347 | 0.3741 | 0.0257* | |
H5 | −0.0395 | 0.9813 | 0.3278 | 0.0364* | |
H6 | −0.1826 | 0.9860 | 0.2613 | 0.0436* | |
H7 | −0.1627 | 0.6807 | 0.1984 | 0.0422* | |
H8 | 0.0032 | 0.3871 | 0.2006 | 0.0399* | |
H9 | 0.1489 | 0.3869 | 0.2661 | 0.0351* | |
H10 | 0.5236 | 0.8455 | 0.2442 | 0.0301* | |
H11 | 0.4909 | 1.1120 | 0.2177 | 0.0301* | |
H12 | 0.3574 | 0.6372 | 0.2073 | 0.0294* | |
H13 | 0.4282 | 0.7720 | 0.1675 | 0.0294* | |
H14 | 0.2122 | 0.9670 | 0.2013 | 0.0284* | |
H15 | 0.2854 | 1.1202 | 0.1644 | 0.0284* | |
H16 | 0.1736 | 0.6257 | 0.1459 | 0.0314* | |
H17 | 0.2447 | 0.7838 | 0.1089 | 0.0314* | |
H18 | 0.0224 | 0.9499 | 0.1420 | 0.0290* | |
H19 | 0.0937 | 1.1109 | 0.1055 | 0.0290* | |
H20 | −0.0139 | 0.6140 | 0.0859 | 0.0326* | |
H21 | 0.0570 | 0.7758 | 0.0493 | 0.0326* | |
H22 | −0.1673 | 0.9299 | 0.0822 | 0.0324* | |
H23 | −0.0951 | 1.1043 | 0.0479 | 0.0324* | |
H24 | −0.1975 | 0.6068 | 0.0224 | 0.0314* | |
H25 | −0.1267 | 0.7840 | −0.0119 | 0.0314* | |
H26 | −0.3529 | 0.9196 | 0.0211 | 0.0294* | |
H27 | −0.2818 | 1.1002 | −0.0126 | 0.0294* | |
H28 | −0.3813 | 0.6038 | −0.0393 | 0.0294* | |
H29 | −0.3103 | 0.7848 | −0.0730 | 0.0294* | |
H30 | −0.5379 | 0.9176 | −0.0404 | 0.0323* | |
H31 | −0.4670 | 1.0973 | −0.0743 | 0.0323* | |
H32 | −0.5671 | 0.5990 | −0.1000 | 0.0363* | |
H33 | −0.4926 | 0.7711 | −0.1339 | 0.0363* | |
H34 | −0.7216 | 0.9199 | −0.1041 | 0.0468* | |
H35 | −0.7005 | 0.8160 | −0.1552 | 0.0468* | |
H36 | −0.6471 | 1.0909 | −0.1382 | 0.0468* | |
H37 | 0.460 (4) | 0.773 (10) | 0.6014 (15) | 0.0248* | |
H38 | 0.480 (4) | 1.085 (9) | 0.6111 (14) | 0.0248* | |
H39 | 0.428 (4) | 0.995 (9) | 0.5688 (16) | 0.0248* | |
H40 | 0.2842 | 1.1307 | 0.6187 | 0.0255* | |
H41 | 0.0712 | 0.9779 | 0.6195 | 0.0302* | |
H42 | −0.0850 | 0.7296 | 0.5805 | 0.0326* | |
H43 | −0.0366 | 0.3821 | 0.5296 | 0.0320* | |
H44 | 0.1672 | 0.2956 | 0.5144 | 0.0308* | |
H45 | 0.3250 | 0.5465 | 0.5542 | 0.0275* | |
H46 | 0.3529 | 0.6821 | 0.6740 | 0.0393* | |
H47 | 0.3885 | 0.9738 | 0.6883 | 0.0393* | |
H48 | 0.2523 | 0.8840 | 0.6869 | 0.0393* | |
H49 | 0.537 (4) | 0.754 (10) | 0.4968 (15) | 0.0274* | |
H50 | 0.617 (4) | 0.593 (9) | 0.5315 (15) | 0.0274* | |
Atomic displacement parameters (Å2) top | U11 | U22 | U33 | U12 | U13 | U23 |
O1 | 0.0234 (14) | 0.0554 (18) | 0.0283 (14) | 0.0092 (14) | −0.0032 (11) | −0.0166 (14) |
O2 | 0.0143 (11) | 0.0232 (12) | 0.0274 (13) | 0.0005 (10) | −0.0012 (9) | −0.0011 (11) |
O3 | 0.0258 (14) | 0.0190 (12) | 0.0375 (15) | −0.0016 (11) | 0.0002 (11) | 0.0018 (12) |
O4 | 0.0272 (14) | 0.0278 (14) | 0.0260 (14) | 0.0017 (12) | 0.0009 (11) | −0.0013 (12) |
N1 | 0.0195 (14) | 0.0170 (14) | 0.0221 (14) | −0.0019 (12) | −0.0000 (11) | −0.0020 (12) |
N2 | 0.0189 (15) | 0.0211 (15) | 0.0227 (15) | −0.0024 (14) | −0.0004 (12) | 0.0031 (14) |
C1 | 0.0169 (16) | 0.0198 (17) | 0.0260 (18) | 0.0018 (14) | −0.0019 (13) | −0.0023 (15) |
C2 | 0.0144 (15) | 0.0170 (16) | 0.0245 (17) | 0.0025 (14) | 0.0008 (13) | −0.0007 (15) |
C3 | 0.0217 (18) | 0.0229 (17) | 0.0205 (17) | −0.0008 (15) | −0.0024 (14) | −0.0015 (15) |
C4 | 0.0195 (17) | 0.0258 (17) | 0.0252 (18) | −0.0056 (16) | −0.0001 (14) | 0.0026 (16) |
C5 | 0.0231 (18) | 0.035 (2) | 0.033 (2) | −0.0006 (17) | −0.0015 (16) | −0.0057 (18) |
C6 | 0.027 (2) | 0.040 (2) | 0.041 (2) | 0.0028 (19) | −0.0073 (17) | −0.002 (2) |
C7 | 0.029 (2) | 0.041 (2) | 0.034 (2) | −0.012 (2) | −0.0093 (17) | 0.002 (2) |
C8 | 0.039 (2) | 0.032 (2) | 0.031 (2) | −0.0079 (19) | −0.0016 (17) | −0.0095 (17) |
C9 | 0.028 (2) | 0.027 (2) | 0.034 (2) | −0.0008 (17) | −0.0043 (16) | −0.0024 (17) |
C10 | 0.0170 (17) | 0.0206 (18) | 0.0262 (18) | 0.0008 (15) | −0.0067 (14) | 0.0030 (15) |
C11 | 0.0183 (17) | 0.0267 (18) | 0.0303 (19) | −0.0029 (16) | 0.0015 (14) | 0.0054 (17) |
C12 | 0.0280 (19) | 0.0252 (18) | 0.0231 (17) | 0.0021 (17) | 0.0070 (14) | 0.0027 (16) |
C13 | 0.0259 (18) | 0.0240 (17) | 0.0208 (17) | 0.0030 (16) | 0.0004 (14) | −0.0004 (16) |
C14 | 0.0294 (19) | 0.0237 (18) | 0.0259 (18) | 0.0035 (16) | −0.0015 (15) | −0.0003 (16) |
C15 | 0.0252 (17) | 0.0232 (17) | 0.0237 (17) | 0.0018 (16) | −0.0024 (14) | −0.0002 (16) |
C16 | 0.031 (2) | 0.0233 (18) | 0.0276 (18) | −0.0002 (17) | −0.0039 (15) | −0.0041 (17) |
C17 | 0.0311 (19) | 0.0219 (17) | 0.0281 (19) | 0.0004 (17) | −0.0024 (15) | −0.0029 (17) |
C18 | 0.0293 (19) | 0.0219 (17) | 0.0265 (18) | −0.0005 (16) | −0.0032 (15) | −0.0016 (16) |
C19 | 0.0268 (18) | 0.0209 (17) | 0.0269 (18) | 0.0004 (16) | −0.0006 (14) | −0.0008 (16) |
C20 | 0.0256 (18) | 0.0251 (18) | 0.0228 (17) | 0.0009 (16) | 0.0003 (14) | −0.0011 (16) |
C21 | 0.0270 (18) | 0.0248 (18) | 0.0290 (19) | 0.0007 (17) | 0.0017 (15) | −0.0006 (17) |
C22 | 0.035 (2) | 0.031 (2) | 0.0260 (19) | 0.0031 (19) | −0.0003 (16) | −0.0012 (18) |
C23 | 0.030 (2) | 0.036 (2) | 0.050 (3) | 0.000 (2) | −0.0110 (18) | 0.003 (2) |
C24 | 0.0149 (15) | 0.0212 (16) | 0.0276 (17) | 0.0001 (15) | 0.0009 (13) | 0.0001 (16) |
C25 | 0.0218 (17) | 0.0200 (16) | 0.0211 (16) | −0.0010 (15) | 0.0011 (13) | 0.0073 (15) |
C26 | 0.0172 (17) | 0.030 (2) | 0.0276 (18) | 0.0019 (16) | 0.0045 (14) | 0.0008 (16) |
C27 | 0.0182 (17) | 0.0319 (19) | 0.032 (2) | −0.0010 (16) | 0.0019 (14) | 0.0064 (18) |
C28 | 0.0217 (18) | 0.0242 (18) | 0.033 (2) | −0.0081 (16) | −0.0064 (15) | 0.0070 (16) |
C29 | 0.0233 (18) | 0.0207 (16) | 0.0332 (19) | −0.0016 (16) | −0.0005 (15) | −0.0036 (17) |
C30 | 0.0162 (17) | 0.0261 (18) | 0.0278 (18) | 0.0051 (15) | −0.0008 (14) | 0.0007 (16) |
C31 | 0.0257 (19) | 0.049 (3) | 0.0229 (18) | −0.0050 (19) | 0.0026 (15) | −0.0016 (18) |
Geometric parameters (Å, º) top
O1—C1 | 1.245 (5) | C15—H18 | 0.95 |
O2—C1 | 1.268 (4) | C15—H19 | 0.93 |
O3—C10 | 1.236 (4) | C16—C17 | 1.521 (5) |
O4—H49 | 0.88 (5) | C16—H20 | 0.97 |
O4—H50 | 1.05 (4) | C16—H21 | 0.95 |
N1—C2 | 1.448 (4) | C17—C18 | 1.533 (5) |
N1—C10 | 1.329 (5) | C17—H22 | 0.95 |
N1—H1 | 0.94 (4) | C17—H23 | 0.93 |
N2—C24 | 1.499 (5) | C18—C19 | 1.520 (5) |
N2—H37 | 0.88 (5) | C18—H24 | 0.97 |
N2—H38 | 0.96 (4) | C18—H25 | 0.95 |
N2—H39 | 0.86 (4) | C19—C20 | 1.523 (5) |
C1—C2 | 1.549 (5) | C19—H26 | 0.95 |
C2—C3 | 1.528 (5) | C19—H27 | 0.93 |
C2—H2 | 0.93 | C20—C21 | 1.520 (5) |
C3—C4 | 1.514 (5) | C20—H28 | 0.97 |
C3—H3 | 0.97 | C20—H29 | 0.95 |
C3—H4 | 0.95 | C21—C22 | 1.529 (5) |
C4—C5 | 1.404 (5) | C21—H30 | 0.95 |
C4—C9 | 1.398 (6) | C21—H31 | 0.93 |
C5—C6 | 1.396 (6) | C22—C23 | 1.518 (6) |
C5—H5 | 0.94 | C22—H32 | 0.97 |
C6—C7 | 1.383 (6) | C22—H33 | 0.95 |
C6—H6 | 0.95 | C23—H34 | 0.95 |
C7—C8 | 1.376 (6) | C23—H35 | 0.96 |
C7—H7 | 0.95 | C23—H36 | 0.93 |
C8—C9 | 1.394 (6) | C24—C25 | 1.495 (5) |
C8—H8 | 0.97 | C24—C31 | 1.527 (5) |
C9—H9 | 0.96 | C24—H40 | 0.93 |
C10—C11 | 1.516 (5) | C25—C26 | 1.400 (5) |
C11—C12 | 1.527 (5) | C25—C30 | 1.386 (5) |
C11—H10 | 0.96 | C26—C27 | 1.384 (5) |
C11—H11 | 0.93 | C26—H41 | 0.94 |
C12—C13 | 1.521 (5) | C27—C28 | 1.378 (6) |
C12—H12 | 0.97 | C27—H42 | 0.95 |
C12—H13 | 0.95 | C28—C29 | 1.383 (5) |
C13—C14 | 1.520 (5) | C28—H43 | 0.95 |
C13—H14 | 0.95 | C29—C30 | 1.400 (5) |
C13—H15 | 0.93 | C29—H44 | 0.96 |
C14—C15 | 1.525 (5) | C30—H45 | 0.96 |
C14—H16 | 0.97 | C31—H46 | 0.97 |
C14—H17 | 0.95 | C31—H47 | 0.94 |
C15—C16 | 1.520 (5) | C31—H48 | 0.95 |
| | | |
O1···O4i | 2.683 (4) | O3···C9iv | 3.448 (5) |
O1···C27ii | 3.276 (5) | O4···N2iii | 2.810 (4) |
O1···N2i | 3.532 (4) | O4···O4i | 2.857 (4) |
O2···N2iii | 2.747 (4) | O4···O4iii | 2.857 (4) |
O2···N2i | 2.845 (4) | O4···C1iii | 3.393 (4) |
O2···O4i | 3.397 (4) | N2···C1iii | 3.360 (5) |
O2···C24iii | 3.461 (4) | C26···C29iv | 3.514 (6) |
O3···N1iv | 2.913 (4) | C28···C28ii | 3.555 (6) |
O3···C31i | 3.351 (5) | C28···C28v | 3.555 (6) |
| | | |
H49—O4—H50 | 101 (4) | C15—C16—H20 | 108.6 |
C2—N1—C10 | 121.2 (3) | C15—C16—H21 | 109.1 |
C2—N1—H1 | 120 (3) | C17—C16—H20 | 108.7 |
C10—N1—H1 | 118 (3) | C17—C16—H21 | 109.0 |
C24—N2—H37 | 109 (3) | H20—C16—H21 | 107.6 |
C24—N2—H38 | 107 (2) | C16—C17—C18 | 113.7 (3) |
C24—N2—H39 | 113 (3) | C16—C17—H22 | 107.8 |
H37—N2—H38 | 119 (4) | C16—C17—H23 | 108.3 |
H37—N2—H39 | 114 (4) | C18—C17—H22 | 107.8 |
H38—N2—H39 | 95 (4) | C18—C17—H23 | 108.3 |
O1—C1—O2 | 124.5 (3) | H22—C17—H23 | 111.0 |
O1—C1—C2 | 116.5 (3) | C17—C18—C19 | 113.7 (3) |
O2—C1—C2 | 119.0 (3) | C17—C18—H24 | 108.7 |
N1—C2—C1 | 112.1 (3) | C17—C18—H25 | 109.1 |
N1—C2—C3 | 110.5 (3) | C19—C18—H24 | 108.5 |
N1—C2—H2 | 107.2 | C19—C18—H25 | 108.9 |
C1—C2—C3 | 112.3 (3) | H24—C18—H25 | 107.9 |
C1—C2—H2 | 107.7 | C18—C19—C20 | 113.7 (3) |
C3—C2—H2 | 106.7 | C18—C19—H26 | 107.8 |
C2—C3—C4 | 111.3 (3) | C18—C19—H27 | 108.2 |
C2—C3—H3 | 109.7 | C20—C19—H26 | 107.8 |
C2—C3—H4 | 110.0 | C20—C19—H27 | 108.2 |
C4—C3—H3 | 108.6 | H26—C19—H27 | 111.1 |
C4—C3—H4 | 108.9 | C19—C20—C21 | 113.9 (3) |
H3—C3—H4 | 108.4 | C19—C20—H28 | 108.5 |
C3—C4—C5 | 120.0 (3) | C19—C20—H29 | 109.0 |
C3—C4—C9 | 121.5 (3) | C21—C20—H28 | 108.5 |
C5—C4—C9 | 118.4 (3) | C21—C20—H29 | 109.1 |
C4—C5—C6 | 120.4 (4) | H28—C20—H29 | 107.7 |
C4—C5—H5 | 119.5 | C20—C21—C22 | 113.1 (3) |
C6—C5—H5 | 120.1 | C20—C21—H30 | 108.2 |
C5—C6—C7 | 120.2 (4) | C20—C21—H31 | 108.5 |
C5—C6—H6 | 119.9 | C22—C21—H30 | 107.8 |
C7—C6—H6 | 119.9 | C22—C21—H31 | 108.2 |
C6—C7—C8 | 120.0 (4) | H30—C21—H31 | 111.1 |
C6—C7—H7 | 120.8 | C21—C22—C23 | 113.7 (3) |
C8—C7—H7 | 119.2 | C21—C22—H32 | 108.6 |
C7—C8—C9 | 120.5 (4) | C21—C22—H33 | 108.9 |
C7—C8—H8 | 120.2 | C23—C22—H32 | 108.8 |
C9—C8—H8 | 119.2 | C23—C22—H33 | 109.1 |
C4—C9—C8 | 120.5 (4) | H32—C22—H33 | 107.8 |
C4—C9—H9 | 120.3 | C22—C23—H34 | 108.9 |
C8—C9—H9 | 119.2 | C22—C23—H35 | 108.6 |
O3—C10—N1 | 122.9 (3) | C22—C23—H36 | 109.4 |
O3—C10—C11 | 121.0 (3) | H34—C23—H35 | 108.4 |
N1—C10—C11 | 116.1 (3) | H34—C23—H36 | 111.2 |
C10—C11—C12 | 113.6 (3) | H35—C23—H36 | 110.2 |
C10—C11—H10 | 108.6 | N2—C24—C25 | 111.1 (3) |
C10—C11—H11 | 109.2 | N2—C24—C31 | 108.7 (3) |
C12—C11—H10 | 107.5 | N2—C24—H40 | 108.2 |
C12—C11—H11 | 108.1 | C25—C24—C31 | 113.3 (3) |
H10—C11—H11 | 109.8 | C25—C24—H40 | 107.6 |
C11—C12—C13 | 114.1 (3) | C31—C24—H40 | 107.9 |
C11—C12—H12 | 108.8 | C24—C25—C26 | 117.8 (3) |
C11—C12—H13 | 109.1 | C24—C25—C30 | 124.1 (3) |
C13—C12—H12 | 108.3 | C26—C25—C30 | 118.1 (3) |
C13—C12—H13 | 108.5 | C25—C26—C27 | 121.3 (4) |
H12—C12—H13 | 107.7 | C25—C26—H41 | 119.6 |
C12—C13—C14 | 112.8 (3) | C27—C26—H41 | 119.0 |
C12—C13—H14 | 107.9 | C26—C27—C28 | 119.6 (3) |
C12—C13—H15 | 108.3 | C26—C27—H42 | 120.2 |
C14—C13—H14 | 108.1 | C28—C27—H42 | 120.2 |
C14—C13—H15 | 108.5 | C27—C28—C29 | 120.5 (3) |
H14—C13—H15 | 111.3 | C27—C28—H43 | 119.7 |
C13—C14—C15 | 114.1 (3) | C29—C28—H43 | 119.8 |
C13—C14—H16 | 108.7 | C28—C29—C30 | 119.5 (4) |
C13—C14—H17 | 108.9 | C28—C29—H44 | 120.0 |
C15—C14—H16 | 108.5 | C30—C29—H44 | 120.5 |
C15—C14—H17 | 108.8 | C25—C30—C29 | 120.9 (3) |
H16—C14—H17 | 107.7 | C25—C30—H45 | 120.6 |
C14—C15—C16 | 113.9 (3) | C29—C30—H45 | 118.5 |
C14—C15—H18 | 107.8 | C24—C31—H46 | 109.4 |
C14—C15—H19 | 108.2 | C24—C31—H47 | 110.0 |
C16—C15—H18 | 107.7 | C24—C31—H48 | 110.0 |
C16—C15—H19 | 108.0 | H46—C31—H47 | 108.6 |
H18—C15—H19 | 111.3 | H46—C31—H48 | 108.1 |
C15—C16—C17 | 113.7 (3) | H47—C31—H48 | 110.7 |
| | | |
O1—C1—C2—N1 | 167.1 (3) | C6—C7—C8—C9 | 0.5 (7) |
O1—C1—C2—C3 | −67.8 (4) | C10—C11—C12—C13 | 52.9 (4) |
O2—C1—C2—N1 | −10.0 (4) | C11—C12—C13—C14 | 175.5 (3) |
O2—C1—C2—C3 | 115.1 (4) | C12—C13—C14—C15 | 178.7 (3) |
O3—C10—N1—C2 | −2.4 (5) | C13—C14—C15—C16 | 179.2 (3) |
O3—C10—C11—C12 | −121.3 (4) | C14—C15—C16—C17 | 179.8 (3) |
N1—C2—C3—C4 | −65.2 (4) | C15—C16—C17—C18 | 176.8 (3) |
N1—C10—C11—C12 | 56.7 (4) | C16—C17—C18—C19 | 179.2 (3) |
N2—C24—C25—C26 | −162.9 (3) | C17—C18—C19—C20 | 179.1 (3) |
N2—C24—C25—C30 | 19.9 (5) | C18—C19—C20—C21 | 179.8 (3) |
C1—C2—N1—C10 | −76.7 (4) | C19—C20—C21—C22 | −179.6 (3) |
C1—C2—C3—C4 | 168.8 (3) | C20—C21—C22—C23 | −177.8 (3) |
C2—N1—C10—C11 | 179.7 (3) | C24—C25—C26—C27 | −176.7 (4) |
C2—C3—C4—C5 | −82.7 (4) | C24—C25—C30—C29 | 176.7 (3) |
C2—C3—C4—C9 | 95.1 (4) | C25—C26—C27—C28 | 0.3 (6) |
C3—C2—N1—C10 | 157.2 (3) | C25—C30—C29—C28 | −0.7 (6) |
C3—C4—C5—C6 | 176.8 (4) | C26—C25—C24—C31 | 74.5 (4) |
C3—C4—C9—C8 | −177.0 (4) | C26—C25—C30—C29 | −0.5 (5) |
C4—C5—C6—C7 | 1.1 (6) | C26—C27—C28—C29 | −1.6 (6) |
C4—C9—C8—C7 | −0.5 (6) | C27—C26—C25—C30 | 0.7 (6) |
C5—C4—C9—C8 | 0.8 (6) | C27—C28—C29—C30 | 1.8 (6) |
C5—C6—C7—C8 | −0.8 (7) | C30—C25—C24—C31 | −102.7 (4) |
C6—C5—C4—C9 | −1.1 (6) | C30—C25—C24—C31 | −102.7 (4) |
Symmetry codes: (i) −x+1, y+1/2, −z+1; (ii) −x, y+1/2, −z+1; (iii) −x+1, y−1/2, −z+1; (iv) x, y+1, z; (v) −x, y−1/2, −z+1. |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H49···O4i | 0.88 (5) | 2.01 (5) | 2.857 (4) | 164 (4) |
O4—H50···O1iii | 1.05 (4) | 1.64 (4) | 2.683 (4) | 176 (4) |
N1—H1···O3vi | 0.94 (4) | 1.98 (4) | 2.913 (4) | 170 (4) |
N2—H37···O2iii | 0.88 (5) | 1.97 (5) | 2.845 (4) | 172 (3) |
N2—H38···O2i | 0.96 (4) | 1.83 (4) | 2.747 (4) | 158 (4) |
N2—H39···O4i | 0.86 (4) | 1.96 (4) | 2.810 (4) | 172 (4) |
Symmetry codes: (i) −x+1, y+1/2, −z+1; (iii) −x+1, y−1/2, −z+1; (vi) x, y−1, z. |
Experimental details
Crystal data |
Chemical formula | C8H12N+·C23H36NO3−·H2O |
Mr | 514.73 |
Crystal system, space group | Monoclinic, P21 |
Temperature (K) | 123 |
a, b, c (Å) | 10.920 (4), 4.9902 (17), 27.926 (10) |
β (°) | 94.085 (8) |
V (Å3) | 1517.9 (9) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.07 |
Crystal size (mm) | 0.50 × 0.20 × 0.10 |
|
Data collection |
Diffractometer | Rigaku/MSC Mercury CCD diffractometer |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16351, 3774, 2920 |
Rint | 0.100 |
(sin θ/λ)max (Å−1) | 0.650 |
|
Refinement |
R[F2 > 2σ(F2)], wR(F2), S | 0.068, 0.151, 1.06 |
No. of reflections | 3774 |
No. of parameters | 352 |
No. of restraints | ? |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.20, −0.23 |
Hydrogen-bond geometry (Å, º) top
D—H···A | D—H | H···A | D···A | D—H···A |
O4—H49···O4i | 0.88 (5) | 2.01 (5) | 2.857 (4) | 164 (4) |
O4—H50···O1ii | 1.05 (4) | 1.64 (4) | 2.683 (4) | 176 (4) |
N1—H1···O3iii | 0.94 (4) | 1.98 (4) | 2.913 (4) | 170 (4) |
N2—H37···O2ii | 0.88 (5) | 1.97 (5) | 2.845 (4) | 172 (3) |
N2—H38···O2i | 0.96 (4) | 1.83 (4) | 2.747 (4) | 158 (4) |
N2—H39···O4i | 0.86 (4) | 1.96 (4) | 2.810 (4) | 172 (4) |
Symmetry codes: (i) −x+1, y+1/2, −z+1; (ii) −x+1, y−1/2, −z+1; (iii) x, y−1, z. |
N-Acyl amino acids are generally formed by condensation of amino acids with fatty acids and produce water-soluble anionic surfactants when their acid moieties are neutralized with a range of bases. These compounds are widely used as additives, dispersants and detergents in a variety of industrial and commercial applications due to their biodegradability and low toxicity (Takehara, 1984). There are also growing concerns over the molecular associations of chiral surfactants (Shinitzky & Haimovitz, 1993; Parazak et al., 1994; Ohta et al., 2003) and their applications to chiral analytical techniques such as electrophoresis (Taurus et al., 2003). When N-acyl amino acids are neutralized with optically active bases, diastereoisomeric surfactant salts are formed. Structural studies on these diastereomeric salts may provide the basis for understanding the mechanism of chiral discrimination of N-acyl amino acid surfactants. In this work, we have prepared a diastereomeric salt, (I), from N-tetradecanoyl-L-phenylalanine and (R)-1-phenylethylamine as a model of chiral discrimination of N-acyl amino acids and determined its structure.
The conformation of the tetradecanoyl chain is as most often found for larger alkanes, i.e. staggered with the largest substituents at any C—C bond antiperiplanar with respect to each other (Fig. 1). The C—C bond lengths within the chain range from 1.518 (6) to 1.533 (5) Å and the anglesfrom 112.8 (3) to 114.1 (3)°. These values are similar to those found in a related fatty acid (Amai et al., 1998).
The molecular packing is such that the hydrocarbon chains lie side by side, with neighboring hydrophillic heads pointing in opposite directions. The hydrophilic heads are connected by a network of hydrogen bonds involving the carboxylate group of N-tetradecanoyl-L-phenylalanine, the ammonium group of (R)-1-phenylethylamine and the water molecule (Table 1 and Fig. 2). The amide linkages of N-tetradecanoyl-L-phenylalanine molecules form a N—H···O hydrogen-bondied chain running along the b axis.