




Supporting information
![]() | Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536810053067/fk2033sup1.cif |
![]() | Structure factor file (CIF format) https://doi.org/10.1107/S1600536810053067/fk2033Isup2.hkl |
CCDC reference: 807458
Key indicators
- Single-crystal X-ray study
- T = 143 K
- Mean
(C-C) = 0.003 Å
- R factor = 0.055
- wR factor = 0.134
- Data-to-parameter ratio = 17.7
checkCIF/PLATON results
No syntax errors found
Alert level B PLAT934_ALERT_3_B Number of (Iobs-Icalc)/SigmaW .gt. 10 Outliers . 1
Alert level C DIFMX01_ALERT_2_C The maximum difference density is > 0.1*ZMAX*0.75 _refine_diff_density_max given = 0.739 Test value = 0.600 DIFMX02_ALERT_1_C The maximum difference density is > 0.1*ZMAX*0.75 The relevant atom site should be identified. PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density .... 3.89 PLAT097_ALERT_2_C Large Reported Max. (Positive) Residual Density 0.74 eA-3 PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 10 PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 54 PLAT913_ALERT_3_C Missing # of Very Strong Reflections in FCF .... 1 PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L= 0.600 74
Alert level G PLAT153_ALERT_1_G The su's on the Cell Axes are Equal (x 100000) 400 Ang. PLAT720_ALERT_4_G Number of Unusual/Non-Standard Labels .......... 2
0 ALERT level A = In general: serious problem 1 ALERT level B = Potentially serious problem 8 ALERT level C = Check and explain 2 ALERT level G = General alerts; check 2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 3 ALERT type 2 Indicator that the structure model may be wrong or deficient 4 ALERT type 3 Indicator that the structure quality may be low 2 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check
The title compound was synthesized according to the method reported in the literature (Zhuang et al., 1994) and crystallized from a mixed solvent composed of acetone and water (1:1); colourless block-shaped crystals were obtained after several days.
The amino H atoms were located in a difference Fourier map and refined with N—H distance restrained to 0.85 Å. Positional parameters of all the H atoms bonded to C atoms were calculated geometrically and were allowed to ride on the C atoms to which they were bonded, with C—H distances of 0.95Å (CH), 0.98Å (CH3) or 0.99Å (CH2), and with Uiso(H) =1.2 or 1.5 (methyl) Ueq of the parent atoms.
2-(4-(2-methoxyphenyl)piperazin-1-yl)-N-(pyridin-2-yl)acetamide, (I), is an important intermediate product in the synthesis of 131I-MPPI (Zhuang et al., 1994) and 18 F-MPPF (Lebars et al., 1998), serotonin(5-HT1A) receptor imaging agents (131I-MPPI = 4-(2'-methoxypheny)-1-[2'-(N-2''-pyridinyl)- p-131I-iodobenzamido]ethyl-piperazine and 18 F-MPPF = 4-(2'-methoxyphenyl)-1-[2'-(N-2''-pyridinyl) -p-18 F-fluorobenzamido]ethylpiperazine). We report here the crystal structure of (I).hydrate (Fig. 1). The molecule of (I) consists of an anisole and an N-ethylpyridin-2-amine arms connected to a piperazine ring. The piperazine ring adopts a chair conformation. The dihedral angle between the phenyl and pyridine rings is 67.6 (9)°. The conformations of the attachment of the anisole and N-ethylpyridin-2-amine groups to the piperazine ring are best described by the torsion angles of 171.99 (18)° and -174.56 (18)° for C6—N1—C7—C8 and C11—N2—C9—C10, respectively; i.e. they adopt +antiperiplanar conformations. The molecules show intra- and intermolecular hydrogen-bonding interactions of types N—H···N, C—H···N and C—H···O (Table 1).
For the use of the title compound in the synthesis of receptor imaging agents, see: Lebars et al. (1998); Zhuang et al. (1994).
Data collection: CrystalClear (Rigaku, 2008); cell refinement: CrystalClear (Rigaku, 2008); data reduction: CrystalClear (Rigaku, 2008); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXL97 (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).
![]() | Fig. 1. A view of the title compound with the atomic numbering scheme with displacement ellipsoids drawn at the 50% probability level. |
C18H22N4O2 | Z = 4 |
Mr = 326.40 | F(000) = 696 |
Triclinic, P1 | Dx = 1.247 Mg m−3 |
Hall symbol: -P 1 | Mo Kα radiation, λ = 0.71073 Å |
a = 11.595 (4) Å | Cell parameters from 3991 reflections |
b = 12.382 (4) Å | θ = 3.0–27.5° |
c = 14.073 (4) Å | µ = 0.08 mm−1 |
α = 106.228 (4)° | T = 143 K |
β = 91.767 (3)° | Prism, colourless |
γ = 114.627 (2)° | 0.21 × 0.17 × 0.09 mm |
V = 1738.2 (9) Å3 |
Rigaku AFC10/Saturn724+ diffractometer | 4689 reflections with I > 2σ(I) |
Radiation source: Rotating Anode | Rint = 0.041 |
Graphite monochromator | θmax = 27.5°, θmin = 3.0° |
Detector resolution: 28.5714 pixels mm-1 | h = −15→15 |
φ and ω scans | k = −16→12 |
16957 measured reflections | l = −18→18 |
7823 independent reflections |
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)] = 0.055 | Hydrogen site location: difmap and geom |
wR(F2) = 0.134 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | w = 1/[σ2(Fo2) + (0.0569P)2 + 0.168P] where P = (Fo2 + 2Fc2)/3 |
7823 reflections | (Δ/σ)max = 0.001 |
443 parameters | Δρmax = 0.74 e Å−3 |
0 restraints | Δρmin = −0.19 e Å−3 |
C18H22N4O2 | γ = 114.627 (2)° |
Mr = 326.40 | V = 1738.2 (9) Å3 |
Triclinic, P1 | Z = 4 |
a = 11.595 (4) Å | Mo Kα radiation |
b = 12.382 (4) Å | µ = 0.08 mm−1 |
c = 14.073 (4) Å | T = 143 K |
α = 106.228 (4)° | 0.21 × 0.17 × 0.09 mm |
β = 91.767 (3)° |
Rigaku AFC10/Saturn724+ diffractometer | 4689 reflections with I > 2σ(I) |
16957 measured reflections | Rint = 0.041 |
7823 independent reflections |
R[F2 > 2σ(F2)] = 0.055 | 0 restraints |
wR(F2) = 0.134 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.00 | Δρmax = 0.74 e Å−3 |
7823 reflections | Δρmin = −0.19 e Å−3 |
443 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 | ||
O1 | −0.16031 (14) | 0.19320 (13) | 0.60110 (10) | 0.0318 (4) | |
O2 | 0.26509 (14) | 0.03711 (15) | 0.17233 (10) | 0.0389 (4) | |
N1 | 0.04151 (16) | 0.31688 (15) | 0.51774 (11) | 0.0248 (4) | |
N2 | 0.15938 (16) | 0.22961 (16) | 0.35729 (11) | 0.0264 (4) | |
N3 | 0.35747 (16) | 0.17050 (17) | 0.33185 (12) | 0.0260 (4) | |
N4 | 0.54677 (16) | 0.24391 (16) | 0.43628 (12) | 0.0290 (4) | |
C1 | −0.0797 (2) | 0.31511 (19) | 0.65726 (14) | 0.0263 (4) | |
C2 | −0.0993 (2) | 0.3747 (2) | 0.75015 (14) | 0.0304 (5) | |
H2 | −0.1719 | 0.3312 | 0.7774 | 0.037* | |
C3 | −0.0128 (2) | 0.4982 (2) | 0.80355 (16) | 0.0371 (5) | |
H3 | −0.0263 | 0.5386 | 0.8673 | 0.044* | |
C4 | 0.0919 (2) | 0.5616 (2) | 0.76425 (16) | 0.0388 (6) | |
H4 | 0.1507 | 0.6459 | 0.8005 | 0.047* | |
C5 | 0.1115 (2) | 0.5019 (2) | 0.67106 (15) | 0.0330 (5) | |
H5 | 0.1846 | 0.5461 | 0.6446 | 0.040* | |
C6 | 0.02656 (19) | 0.37892 (19) | 0.61564 (13) | 0.0254 (4) | |
C7 | 0.0808 (2) | 0.2177 (2) | 0.51565 (14) | 0.0291 (5) | |
H7A | 0.0225 | 0.1601 | 0.5484 | 0.035* | |
H7B | 0.1693 | 0.2557 | 0.5533 | 0.035* | |
C8 | 0.0760 (2) | 0.14470 (19) | 0.40775 (14) | 0.0297 (5) | |
H8A | 0.1047 | 0.0796 | 0.4070 | 0.036* | |
H8B | −0.0136 | 0.1023 | 0.3713 | 0.036* | |
C9 | 0.1161 (2) | 0.3261 (2) | 0.35931 (14) | 0.0310 (5) | |
H9A | 0.0260 | 0.2858 | 0.3243 | 0.037* | |
H9B | 0.1705 | 0.3827 | 0.3240 | 0.037* | |
C10 | 0.1254 (2) | 0.4008 (2) | 0.46679 (14) | 0.0304 (5) | |
H10A | 0.2155 | 0.4413 | 0.5018 | 0.036* | |
H10B | 0.0987 | 0.4675 | 0.4684 | 0.036* | |
C11 | 0.1642 (2) | 0.1621 (2) | 0.25557 (13) | 0.0297 (5) | |
H11A | 0.1808 | 0.2184 | 0.2144 | 0.036* | |
H11B | 0.0788 | 0.0898 | 0.2263 | 0.036* | |
C12 | 0.26561 (19) | 0.11417 (19) | 0.24878 (14) | 0.0270 (5) | |
C13 | 0.47825 (19) | 0.17094 (19) | 0.34499 (14) | 0.0244 (4) | |
C14 | 0.5227 (2) | 0.1054 (2) | 0.27087 (15) | 0.0326 (5) | |
H14 | 0.4697 | 0.0520 | 0.2078 | 0.039* | |
C15 | 0.6471 (2) | 0.1202 (2) | 0.29197 (16) | 0.0367 (5) | |
H15 | 0.6816 | 0.0783 | 0.2425 | 0.044* | |
C16 | 0.7206 (2) | 0.1964 (2) | 0.38561 (16) | 0.0346 (5) | |
H16 | 0.8062 | 0.2084 | 0.4015 | 0.042* | |
C17 | 0.6659 (2) | 0.2542 (2) | 0.45484 (16) | 0.0336 (5) | |
H17 | 0.7153 | 0.3045 | 0.5197 | 0.040* | |
C18 | −0.2720 (2) | 0.1297 (2) | 0.64012 (17) | 0.0411 (6) | |
H18A | −0.2460 | 0.1235 | 0.7045 | 0.062* | |
H18B | −0.3236 | 0.0453 | 0.5926 | 0.062* | |
H18C | −0.3234 | 0.1767 | 0.6500 | 0.062* | |
H03 | 0.345 (2) | 0.224 (2) | 0.3780 (15) | 0.036 (7)* | |
O3 | 0.31024 (14) | 0.19997 (13) | 0.69524 (10) | 0.0328 (4) | |
O4 | −0.20714 (14) | 0.09195 (14) | 1.08091 (10) | 0.0364 (4) | |
N5 | 0.27157 (15) | 0.34038 (15) | 0.86559 (11) | 0.0247 (4) | |
N6 | 0.07490 (15) | 0.27036 (16) | 0.98664 (11) | 0.0258 (4) | |
N7 | −0.17632 (17) | 0.22583 (16) | 0.99004 (12) | 0.0261 (4) | |
N8 | −0.31000 (17) | 0.26615 (17) | 0.89803 (12) | 0.0318 (4) | |
C19 | 0.37328 (19) | 0.3275 (2) | 0.71544 (14) | 0.0278 (5) | |
C20 | 0.4550 (2) | 0.3846 (2) | 0.65566 (15) | 0.0341 (5) | |
H20 | 0.4689 | 0.3348 | 0.5965 | 0.041* | |
C21 | 0.5165 (2) | 0.5145 (2) | 0.68257 (17) | 0.0442 (6) | |
H21 | 0.5720 | 0.5534 | 0.6414 | 0.053* | |
C22 | 0.4978 (2) | 0.5871 (2) | 0.76827 (18) | 0.0459 (6) | |
H22 | 0.5411 | 0.6760 | 0.7869 | 0.055* | |
C23 | 0.4155 (2) | 0.5301 (2) | 0.82765 (16) | 0.0362 (5) | |
H23 | 0.4025 | 0.5812 | 0.8865 | 0.043* | |
C24 | 0.35148 (19) | 0.4006 (2) | 0.80341 (14) | 0.0266 (5) | |
C25 | 0.13434 (19) | 0.26517 (19) | 0.82010 (14) | 0.0276 (5) | |
H25A | 0.1261 | 0.2088 | 0.7520 | 0.033* | |
H25B | 0.0960 | 0.3215 | 0.8139 | 0.033* | |
C26 | 0.0632 (2) | 0.1882 (2) | 0.88466 (14) | 0.0301 (5) | |
H26A | −0.0288 | 0.1382 | 0.8539 | 0.036* | |
H26B | 0.0991 | 0.1293 | 0.8883 | 0.036* | |
C27 | 0.21204 (19) | 0.3438 (2) | 1.03070 (14) | 0.0302 (5) | |
H27A | 0.2496 | 0.2865 | 1.0353 | 0.036* | |
H27B | 0.2215 | 0.3994 | 1.0994 | 0.036* | |
C28 | 0.2834 (2) | 0.4222 (2) | 0.96688 (14) | 0.0311 (5) | |
H28A | 0.2471 | 0.4808 | 0.9634 | 0.037* | |
H28B | 0.3753 | 0.4723 | 0.9977 | 0.037* | |
C29 | 0.0039 (2) | 0.1977 (2) | 1.04953 (14) | 0.0296 (5) | |
H29A | 0.0444 | 0.2460 | 1.1206 | 0.036* | |
H29B | 0.0133 | 0.1189 | 1.0326 | 0.036* | |
C30 | −0.1381 (2) | 0.16446 (19) | 1.04003 (14) | 0.0264 (5) | |
C31 | −0.30054 (19) | 0.21492 (19) | 0.96784 (13) | 0.0250 (4) | |
C32 | −0.4019 (2) | 0.15893 (19) | 1.01496 (15) | 0.0300 (5) | |
H32 | −0.3907 | 0.1248 | 1.0652 | 0.036* | |
C33 | −0.5194 (2) | 0.1543 (2) | 0.98670 (16) | 0.0346 (5) | |
H33 | −0.5907 | 0.1163 | 1.0174 | 0.042* | |
C34 | −0.5328 (2) | 0.2049 (2) | 0.91386 (16) | 0.0362 (5) | |
H34 | −0.6130 | 0.2019 | 0.8929 | 0.043* | |
C35 | −0.4262 (2) | 0.2599 (2) | 0.87240 (16) | 0.0369 (5) | |
H35 | −0.4350 | 0.2956 | 0.8227 | 0.044* | |
C36 | 0.3320 (2) | 0.1232 (2) | 0.60821 (16) | 0.0408 (6) | |
H36A | 0.3084 | 0.1408 | 0.5487 | 0.061* | |
H36B | 0.2793 | 0.0346 | 0.6007 | 0.061* | |
H36C | 0.4231 | 0.1414 | 0.6154 | 0.061* | |
H07 | −0.118 (2) | 0.271 (2) | 0.9629 (15) | 0.032 (6)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
O1 | 0.0284 (8) | 0.0330 (8) | 0.0296 (7) | 0.0089 (7) | 0.0087 (6) | 0.0107 (6) |
O2 | 0.0337 (9) | 0.0433 (10) | 0.0289 (8) | 0.0161 (8) | 0.0021 (6) | −0.0025 (7) |
N1 | 0.0269 (9) | 0.0278 (9) | 0.0236 (8) | 0.0136 (8) | 0.0063 (7) | 0.0114 (7) |
N2 | 0.0258 (9) | 0.0322 (10) | 0.0233 (8) | 0.0134 (8) | 0.0046 (7) | 0.0109 (7) |
N3 | 0.0252 (10) | 0.0298 (10) | 0.0227 (9) | 0.0137 (8) | 0.0045 (7) | 0.0054 (8) |
N4 | 0.0278 (10) | 0.0306 (10) | 0.0279 (9) | 0.0126 (8) | 0.0011 (7) | 0.0095 (7) |
C1 | 0.0273 (11) | 0.0306 (11) | 0.0258 (10) | 0.0162 (9) | 0.0028 (8) | 0.0110 (9) |
C2 | 0.0292 (12) | 0.0393 (13) | 0.0298 (11) | 0.0185 (10) | 0.0089 (9) | 0.0154 (10) |
C3 | 0.0426 (14) | 0.0390 (14) | 0.0304 (11) | 0.0226 (12) | 0.0086 (10) | 0.0049 (10) |
C4 | 0.0404 (14) | 0.0320 (13) | 0.0383 (12) | 0.0153 (11) | 0.0069 (10) | 0.0043 (10) |
C5 | 0.0297 (12) | 0.0317 (12) | 0.0349 (11) | 0.0107 (10) | 0.0081 (9) | 0.0112 (10) |
C6 | 0.0261 (11) | 0.0331 (12) | 0.0231 (10) | 0.0164 (10) | 0.0049 (8) | 0.0124 (9) |
C7 | 0.0319 (12) | 0.0320 (12) | 0.0301 (11) | 0.0170 (10) | 0.0083 (9) | 0.0150 (9) |
C8 | 0.0297 (12) | 0.0288 (12) | 0.0326 (11) | 0.0142 (10) | 0.0073 (9) | 0.0106 (9) |
C9 | 0.0313 (12) | 0.0395 (13) | 0.0329 (11) | 0.0193 (11) | 0.0105 (9) | 0.0209 (10) |
C10 | 0.0325 (12) | 0.0290 (12) | 0.0327 (11) | 0.0143 (10) | 0.0105 (9) | 0.0129 (9) |
C11 | 0.0234 (11) | 0.0397 (13) | 0.0245 (10) | 0.0133 (10) | 0.0015 (8) | 0.0099 (9) |
C12 | 0.0247 (11) | 0.0288 (11) | 0.0235 (10) | 0.0075 (9) | 0.0052 (8) | 0.0093 (9) |
C13 | 0.0235 (11) | 0.0261 (11) | 0.0254 (10) | 0.0093 (9) | 0.0068 (8) | 0.0131 (8) |
C14 | 0.0313 (12) | 0.0410 (13) | 0.0283 (11) | 0.0180 (11) | 0.0073 (9) | 0.0117 (10) |
C15 | 0.0353 (13) | 0.0464 (15) | 0.0371 (12) | 0.0232 (12) | 0.0140 (10) | 0.0171 (11) |
C16 | 0.0243 (12) | 0.0376 (13) | 0.0461 (13) | 0.0123 (10) | 0.0074 (9) | 0.0214 (11) |
C17 | 0.0289 (12) | 0.0350 (12) | 0.0346 (11) | 0.0116 (10) | −0.0006 (9) | 0.0127 (10) |
C18 | 0.0376 (14) | 0.0358 (14) | 0.0423 (13) | 0.0059 (11) | 0.0162 (10) | 0.0166 (11) |
O3 | 0.0421 (10) | 0.0291 (8) | 0.0297 (8) | 0.0180 (7) | 0.0115 (6) | 0.0088 (6) |
O4 | 0.0331 (9) | 0.0422 (9) | 0.0377 (8) | 0.0140 (8) | 0.0107 (7) | 0.0224 (7) |
N5 | 0.0219 (9) | 0.0281 (9) | 0.0215 (8) | 0.0093 (8) | 0.0031 (6) | 0.0070 (7) |
N6 | 0.0203 (9) | 0.0317 (10) | 0.0236 (8) | 0.0092 (8) | 0.0041 (6) | 0.0096 (7) |
N7 | 0.0221 (9) | 0.0293 (10) | 0.0272 (9) | 0.0091 (8) | 0.0068 (7) | 0.0129 (8) |
N8 | 0.0339 (11) | 0.0384 (11) | 0.0279 (9) | 0.0182 (9) | 0.0064 (7) | 0.0142 (8) |
C19 | 0.0257 (11) | 0.0303 (12) | 0.0288 (10) | 0.0139 (10) | 0.0020 (8) | 0.0095 (9) |
C20 | 0.0315 (13) | 0.0424 (14) | 0.0299 (11) | 0.0162 (11) | 0.0085 (9) | 0.0137 (10) |
C21 | 0.0377 (15) | 0.0455 (15) | 0.0464 (14) | 0.0100 (12) | 0.0181 (11) | 0.0225 (12) |
C22 | 0.0468 (16) | 0.0318 (13) | 0.0498 (14) | 0.0065 (12) | 0.0155 (12) | 0.0160 (11) |
C23 | 0.0349 (13) | 0.0293 (12) | 0.0390 (12) | 0.0093 (10) | 0.0092 (10) | 0.0105 (10) |
C24 | 0.0210 (11) | 0.0314 (12) | 0.0272 (10) | 0.0107 (9) | 0.0042 (8) | 0.0105 (9) |
C25 | 0.0241 (11) | 0.0309 (12) | 0.0243 (10) | 0.0096 (9) | 0.0012 (8) | 0.0082 (9) |
C26 | 0.0259 (11) | 0.0326 (12) | 0.0266 (10) | 0.0091 (10) | 0.0025 (8) | 0.0082 (9) |
C27 | 0.0231 (11) | 0.0389 (13) | 0.0250 (10) | 0.0128 (10) | 0.0013 (8) | 0.0070 (9) |
C28 | 0.0237 (11) | 0.0328 (12) | 0.0284 (10) | 0.0081 (10) | 0.0036 (8) | 0.0049 (9) |
C29 | 0.0286 (12) | 0.0370 (13) | 0.0270 (10) | 0.0166 (10) | 0.0047 (8) | 0.0125 (9) |
C30 | 0.0297 (12) | 0.0265 (11) | 0.0215 (9) | 0.0112 (10) | 0.0046 (8) | 0.0075 (8) |
C31 | 0.0238 (11) | 0.0255 (11) | 0.0235 (9) | 0.0112 (9) | 0.0025 (8) | 0.0043 (8) |
C32 | 0.0270 (12) | 0.0296 (12) | 0.0321 (11) | 0.0109 (10) | 0.0077 (9) | 0.0105 (9) |
C33 | 0.0270 (12) | 0.0298 (12) | 0.0415 (12) | 0.0103 (10) | 0.0088 (9) | 0.0065 (10) |
C34 | 0.0287 (13) | 0.0388 (14) | 0.0390 (12) | 0.0178 (11) | 0.0009 (9) | 0.0053 (10) |
C35 | 0.0367 (14) | 0.0467 (15) | 0.0329 (11) | 0.0246 (12) | 0.0040 (9) | 0.0117 (10) |
C36 | 0.0558 (17) | 0.0380 (14) | 0.0356 (12) | 0.0285 (13) | 0.0134 (11) | 0.0094 (11) |
O1—C1 | 1.374 (2) | O3—C19 | 1.372 (2) |
O1—C18 | 1.426 (2) | O3—C36 | 1.427 (2) |
O2—C12 | 1.220 (2) | O4—C30 | 1.223 (2) |
N1—C6 | 1.433 (2) | N5—C24 | 1.421 (2) |
N1—C10 | 1.469 (2) | N5—C28 | 1.464 (2) |
N1—C7 | 1.470 (3) | N5—C25 | 1.476 (2) |
N2—C11 | 1.458 (2) | N6—C29 | 1.464 (2) |
N2—C8 | 1.469 (2) | N6—C27 | 1.469 (2) |
N2—C9 | 1.470 (3) | N6—C26 | 1.473 (2) |
N3—C12 | 1.355 (2) | N7—C30 | 1.352 (3) |
N3—C13 | 1.404 (3) | N7—C31 | 1.406 (3) |
N3—H03 | 0.85 (2) | N7—H07 | 0.86 (2) |
N4—C13 | 1.337 (2) | N8—C31 | 1.334 (3) |
N4—C17 | 1.343 (3) | N8—C35 | 1.348 (3) |
C1—C2 | 1.387 (3) | C19—C20 | 1.389 (3) |
C1—C6 | 1.406 (3) | C19—C24 | 1.414 (3) |
C2—C3 | 1.394 (3) | C20—C21 | 1.388 (3) |
C2—H2 | 0.9500 | C20—H20 | 0.9500 |
C3—C4 | 1.374 (3) | C21—C22 | 1.372 (3) |
C3—H3 | 0.9500 | C21—H21 | 0.9500 |
C4—C5 | 1.391 (3) | C22—C23 | 1.387 (3) |
C4—H4 | 0.9500 | C22—H22 | 0.9500 |
C5—C6 | 1.391 (3) | C23—C24 | 1.388 (3) |
C5—H5 | 0.9500 | C23—H23 | 0.9500 |
C7—C8 | 1.521 (3) | C25—C26 | 1.513 (3) |
C7—H7A | 0.9900 | C25—H25A | 0.9900 |
C7—H7B | 0.9900 | C25—H25B | 0.9900 |
C8—H8A | 0.9900 | C26—H26A | 0.9900 |
C8—H8B | 0.9900 | C26—H26B | 0.9900 |
C9—C10 | 1.510 (3) | C27—C28 | 1.515 (3) |
C9—H9A | 0.9900 | C27—H27A | 0.9900 |
C9—H9B | 0.9900 | C27—H27B | 0.9900 |
C10—H10A | 0.9900 | C28—H28A | 0.9900 |
C10—H10B | 0.9900 | C28—H28B | 0.9900 |
C11—C12 | 1.517 (3) | C29—C30 | 1.513 (3) |
C11—H11A | 0.9900 | C29—H29A | 0.9900 |
C11—H11B | 0.9900 | C29—H29B | 0.9900 |
C13—C14 | 1.386 (3) | C31—C32 | 1.388 (3) |
C14—C15 | 1.387 (3) | C32—C33 | 1.381 (3) |
C14—H14 | 0.9500 | C32—H32 | 0.9500 |
C15—C16 | 1.386 (3) | C33—C34 | 1.378 (3) |
C15—H15 | 0.9500 | C33—H33 | 0.9500 |
C16—C17 | 1.375 (3) | C34—C35 | 1.377 (3) |
C16—H16 | 0.9500 | C34—H34 | 0.9500 |
C17—H17 | 0.9500 | C35—H35 | 0.9500 |
C18—H18A | 0.9800 | C36—H36A | 0.9800 |
C18—H18B | 0.9800 | C36—H36B | 0.9800 |
C18—H18C | 0.9800 | C36—H36C | 0.9800 |
C1—O1—C18 | 116.84 (15) | C19—O3—C36 | 117.38 (16) |
C6—N1—C10 | 114.88 (16) | C24—N5—C28 | 115.19 (16) |
C6—N1—C7 | 113.42 (15) | C24—N5—C25 | 114.62 (15) |
C10—N1—C7 | 110.02 (15) | C28—N5—C25 | 109.58 (14) |
C11—N2—C8 | 111.99 (16) | C29—N6—C27 | 110.89 (15) |
C11—N2—C9 | 112.14 (16) | C29—N6—C26 | 111.33 (16) |
C8—N2—C9 | 109.09 (15) | C27—N6—C26 | 108.63 (15) |
C12—N3—C13 | 129.39 (18) | C30—N7—C31 | 128.76 (18) |
C12—N3—H03 | 113.4 (15) | C30—N7—H07 | 114.5 (15) |
C13—N3—H03 | 116.0 (15) | C31—N7—H07 | 116.3 (15) |
C13—N4—C17 | 116.92 (17) | C31—N8—C35 | 116.63 (18) |
O1—C1—C2 | 123.16 (18) | O3—C19—C20 | 123.64 (18) |
O1—C1—C6 | 116.37 (16) | O3—C19—C24 | 115.77 (17) |
C2—C1—C6 | 120.46 (19) | C20—C19—C24 | 120.6 (2) |
C1—C2—C3 | 120.11 (19) | C21—C20—C19 | 119.8 (2) |
C1—C2—H2 | 119.9 | C21—C20—H20 | 120.1 |
C3—C2—H2 | 119.9 | C19—C20—H20 | 120.1 |
C4—C3—C2 | 120.17 (19) | C22—C21—C20 | 120.5 (2) |
C4—C3—H3 | 119.9 | C22—C21—H21 | 119.8 |
C2—C3—H3 | 119.9 | C20—C21—H21 | 119.8 |
C3—C4—C5 | 119.7 (2) | C21—C22—C23 | 119.7 (2) |
C3—C4—H4 | 120.2 | C21—C22—H22 | 120.1 |
C5—C4—H4 | 120.2 | C23—C22—H22 | 120.1 |
C4—C5—C6 | 121.55 (19) | C22—C23—C24 | 121.8 (2) |
C4—C5—H5 | 119.2 | C22—C23—H23 | 119.1 |
C6—C5—H5 | 119.2 | C24—C23—H23 | 119.1 |
C5—C6—C1 | 118.02 (17) | C23—C24—C19 | 117.59 (18) |
C5—C6—N1 | 122.69 (17) | C23—C24—N5 | 122.76 (18) |
C1—C6—N1 | 119.26 (18) | C19—C24—N5 | 119.57 (19) |
N1—C7—C8 | 110.03 (16) | N5—C25—C26 | 109.92 (16) |
N1—C7—H7A | 109.7 | N5—C25—H25A | 109.7 |
C8—C7—H7A | 109.7 | C26—C25—H25A | 109.7 |
N1—C7—H7B | 109.7 | N5—C25—H25B | 109.7 |
C8—C7—H7B | 109.7 | C26—C25—H25B | 109.7 |
H7A—C7—H7B | 108.2 | H25A—C25—H25B | 108.2 |
N2—C8—C7 | 110.27 (16) | N6—C26—C25 | 110.55 (17) |
N2—C8—H8A | 109.6 | N6—C26—H26A | 109.5 |
C7—C8—H8A | 109.6 | C25—C26—H26A | 109.5 |
N2—C8—H8B | 109.6 | N6—C26—H26B | 109.5 |
C7—C8—H8B | 109.6 | C25—C26—H26B | 109.5 |
H8A—C8—H8B | 108.1 | H26A—C26—H26B | 108.1 |
N2—C9—C10 | 109.63 (16) | N6—C27—C28 | 110.30 (16) |
N2—C9—H9A | 109.7 | N6—C27—H27A | 109.6 |
C10—C9—H9A | 109.7 | C28—C27—H27A | 109.6 |
N2—C9—H9B | 109.7 | N6—C27—H27B | 109.6 |
C10—C9—H9B | 109.7 | C28—C27—H27B | 109.6 |
H9A—C9—H9B | 108.2 | H27A—C27—H27B | 108.1 |
N1—C10—C9 | 109.40 (16) | N5—C28—C27 | 109.87 (17) |
N1—C10—H10A | 109.8 | N5—C28—H28A | 109.7 |
C9—C10—H10A | 109.8 | C27—C28—H28A | 109.7 |
N1—C10—H10B | 109.8 | N5—C28—H28B | 109.7 |
C9—C10—H10B | 109.8 | C27—C28—H28B | 109.7 |
H10A—C10—H10B | 108.2 | H28A—C28—H28B | 108.2 |
N2—C11—C12 | 114.41 (16) | N6—C29—C30 | 115.62 (17) |
N2—C11—H11A | 108.7 | N6—C29—H29A | 108.4 |
C12—C11—H11A | 108.7 | C30—C29—H29A | 108.4 |
N2—C11—H11B | 108.7 | N6—C29—H29B | 108.4 |
C12—C11—H11B | 108.7 | C30—C29—H29B | 108.4 |
H11A—C11—H11B | 107.6 | H29A—C29—H29B | 107.4 |
O2—C12—N3 | 125.0 (2) | O4—C30—N7 | 125.2 (2) |
O2—C12—C11 | 121.35 (18) | O4—C30—C29 | 119.63 (19) |
N3—C12—C11 | 113.57 (17) | N7—C30—C29 | 115.06 (17) |
N4—C13—C14 | 123.7 (2) | N8—C31—C32 | 123.6 (2) |
N4—C13—N3 | 112.45 (17) | N8—C31—N7 | 112.81 (17) |
C14—C13—N3 | 123.79 (18) | C32—C31—N7 | 123.57 (19) |
C13—C14—C15 | 117.8 (2) | C33—C32—C31 | 118.1 (2) |
C13—C14—H14 | 121.1 | C33—C32—H32 | 121.0 |
C15—C14—H14 | 121.1 | C31—C32—H32 | 121.0 |
C16—C15—C14 | 119.6 (2) | C34—C33—C32 | 119.7 (2) |
C16—C15—H15 | 120.2 | C34—C33—H33 | 120.1 |
C14—C15—H15 | 120.2 | C32—C33—H33 | 120.1 |
C17—C16—C15 | 117.9 (2) | C35—C34—C33 | 117.9 (2) |
C17—C16—H16 | 121.0 | C35—C34—H34 | 121.0 |
C15—C16—H16 | 121.0 | C33—C34—H34 | 121.0 |
N4—C17—C16 | 124.0 (2) | N8—C35—C34 | 124.0 (2) |
N4—C17—H17 | 118.0 | N8—C35—H35 | 118.0 |
C16—C17—H17 | 118.0 | C34—C35—H35 | 118.0 |
O1—C18—H18A | 109.5 | O3—C36—H36A | 109.5 |
O1—C18—H18B | 109.5 | O3—C36—H36B | 109.5 |
H18A—C18—H18B | 109.5 | H36A—C36—H36B | 109.5 |
O1—C18—H18C | 109.5 | O3—C36—H36C | 109.5 |
H18A—C18—H18C | 109.5 | H36A—C36—H36C | 109.5 |
H18B—C18—H18C | 109.5 | H36B—C36—H36C | 109.5 |
C18—O1—C1—C2 | 3.2 (3) | C36—O3—C19—C20 | 0.6 (3) |
C18—O1—C1—C6 | −176.80 (19) | C36—O3—C19—C24 | −178.73 (19) |
O1—C1—C2—C3 | 179.3 (2) | O3—C19—C20—C21 | −179.0 (2) |
C6—C1—C2—C3 | −0.7 (3) | C24—C19—C20—C21 | 0.3 (3) |
C1—C2—C3—C4 | 0.3 (3) | C19—C20—C21—C22 | 0.5 (4) |
C2—C3—C4—C5 | −0.2 (4) | C20—C21—C22—C23 | −0.9 (4) |
C3—C4—C5—C6 | 0.6 (4) | C21—C22—C23—C24 | 0.6 (4) |
C4—C5—C6—C1 | −1.0 (3) | C22—C23—C24—C19 | 0.2 (3) |
C4—C5—C6—N1 | 177.4 (2) | C22—C23—C24—N5 | 176.9 (2) |
O1—C1—C6—C5 | −178.98 (18) | O3—C19—C24—C23 | 178.73 (19) |
C2—C1—C6—C5 | 1.0 (3) | C20—C19—C24—C23 | −0.6 (3) |
O1—C1—C6—N1 | 2.6 (3) | O3—C19—C24—N5 | 1.9 (3) |
C2—C1—C6—N1 | −177.39 (18) | C20—C19—C24—N5 | −177.44 (19) |
C10—N1—C6—C5 | −18.5 (3) | C28—N5—C24—C23 | −13.1 (3) |
C7—N1—C6—C5 | 109.2 (2) | C25—N5—C24—C23 | 115.4 (2) |
C10—N1—C6—C1 | 159.80 (18) | C28—N5—C24—C19 | 163.57 (18) |
C7—N1—C6—C1 | −72.5 (2) | C25—N5—C24—C19 | −67.9 (2) |
C6—N1—C7—C8 | 171.99 (16) | C24—N5—C25—C26 | 170.29 (17) |
C10—N1—C7—C8 | −57.8 (2) | C28—N5—C25—C26 | −58.4 (2) |
C11—N2—C8—C7 | 176.23 (16) | C29—N6—C26—C25 | 178.58 (17) |
C9—N2—C8—C7 | −59.0 (2) | C27—N6—C26—C25 | −59.0 (2) |
N1—C7—C8—N2 | 57.8 (2) | N5—C25—C26—N6 | 59.0 (2) |
C11—N2—C9—C10 | −174.60 (16) | C29—N6—C27—C28 | −177.92 (16) |
C8—N2—C9—C10 | 60.7 (2) | C26—N6—C27—C28 | 59.4 (2) |
C6—N1—C10—C9 | −171.08 (16) | C24—N5—C28—C27 | −170.09 (17) |
C7—N1—C10—C9 | 59.5 (2) | C25—N5—C28—C27 | 58.9 (2) |
N2—C9—C10—N1 | −61.1 (2) | N6—C27—C28—N5 | −60.2 (2) |
C8—N2—C11—C12 | −86.9 (2) | C27—N6—C29—C30 | 154.65 (17) |
C9—N2—C11—C12 | 150.02 (18) | C26—N6—C29—C30 | −84.3 (2) |
C13—N3—C12—O2 | 11.1 (3) | C31—N7—C30—O4 | −4.8 (3) |
C13—N3—C12—C11 | −164.95 (19) | C31—N7—C30—C29 | 179.19 (18) |
N2—C11—C12—O2 | 166.17 (18) | N6—C29—C30—O4 | 171.57 (17) |
N2—C11—C12—N3 | −17.6 (2) | N6—C29—C30—N7 | −12.2 (2) |
C17—N4—C13—C14 | 1.1 (3) | C35—N8—C31—C32 | −1.1 (3) |
C17—N4—C13—N3 | −177.56 (17) | C35—N8—C31—N7 | −179.91 (18) |
C12—N3—C13—N4 | 175.9 (2) | C30—N7—C31—N8 | −165.16 (19) |
C12—N3—C13—C14 | −2.7 (3) | C30—N7—C31—C32 | 16.0 (3) |
N4—C13—C14—C15 | −2.3 (3) | N8—C31—C32—C33 | 1.1 (3) |
N3—C13—C14—C15 | 176.1 (2) | N7—C31—C32—C33 | 179.82 (18) |
C13—C14—C15—C16 | 1.5 (3) | C31—C32—C33—C34 | −0.2 (3) |
C14—C15—C16—C17 | 0.5 (3) | C32—C33—C34—C35 | −0.6 (3) |
C13—N4—C17—C16 | 1.1 (3) | C31—N8—C35—C34 | 0.2 (3) |
C15—C16—C17—N4 | −1.9 (3) | C33—C34—C35—N8 | 0.7 (3) |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H03···N2 | 0.85 (2) | 2.20 (3) | 2.692 (3) | 117.0 (19) |
N7—H07···N6 | 0.86 (2) | 2.26 (3) | 2.734 (3) | 115.3 (19) |
C2—H2···N8 | 0.95 | 2.44 | 3.354 (3) | 161 |
C7—H7A···O1 | 0.99 | 2.42 | 3.010 (3) | 118 |
C14—H14···O2 | 0.95 | 2.33 | 2.923 (3) | 120 |
C20—H20···N4 | 0.95 | 2.59 | 3.527 (3) | 168 |
C25—H25A···O3 | 0.99 | 2.34 | 2.950 (3) | 119 |
C32—H32···O4 | 0.95 | 2.34 | 2.917 (3) | 118 |
Experimental details
Crystal data | |
Chemical formula | C18H22N4O2 |
Mr | 326.40 |
Crystal system, space group | Triclinic, P1 |
Temperature (K) | 143 |
a, b, c (Å) | 11.595 (4), 12.382 (4), 14.073 (4) |
α, β, γ (°) | 106.228 (4), 91.767 (3), 114.627 (2) |
V (Å3) | 1738.2 (9) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.08 |
Crystal size (mm) | 0.21 × 0.17 × 0.09 |
Data collection | |
Diffractometer | Rigaku AFC10/Saturn724+ |
Absorption correction | – |
No. of measured, independent and observed [I > 2σ(I)] reflections | 16957, 7823, 4689 |
Rint | 0.041 |
(sin θ/λ)max (Å−1) | 0.649 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.055, 0.134, 1.00 |
No. of reflections | 7823 |
No. of parameters | 443 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.74, −0.19 |
Computer programs: CrystalClear (Rigaku, 2008), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H03···N2 | 0.85 (2) | 2.20 (3) | 2.692 (3) | 117.0 (19) |
N7—H07···N6 | 0.86 (2) | 2.26 (3) | 2.734 (3) | 115.3 (19) |
C2—H2···N8 | 0.95 | 2.44 | 3.354 (3) | 161 |
C14—H14···O2 | 0.95 | 2.33 | 2.923 (3) | 120 |
C20—H20···N4 | 0.95 | 2.59 | 3.527 (3) | 168 |
2-(4-(2-methoxyphenyl)piperazin-1-yl)-N-(pyridin-2-yl)acetamide, (I), is an important intermediate product in the synthesis of 131I-MPPI (Zhuang et al., 1994) and 18 F-MPPF (Lebars et al., 1998), serotonin(5-HT1A) receptor imaging agents (131I-MPPI = 4-(2'-methoxypheny)-1-[2'-(N-2''-pyridinyl)- p-131I-iodobenzamido]ethyl-piperazine and 18 F-MPPF = 4-(2'-methoxyphenyl)-1-[2'-(N-2''-pyridinyl) -p-18 F-fluorobenzamido]ethylpiperazine). We report here the crystal structure of (I).hydrate (Fig. 1). The molecule of (I) consists of an anisole and an N-ethylpyridin-2-amine arms connected to a piperazine ring. The piperazine ring adopts a chair conformation. The dihedral angle between the phenyl and pyridine rings is 67.6 (9)°. The conformations of the attachment of the anisole and N-ethylpyridin-2-amine groups to the piperazine ring are best described by the torsion angles of 171.99 (18)° and -174.56 (18)° for C6—N1—C7—C8 and C11—N2—C9—C10, respectively; i.e. they adopt +antiperiplanar conformations. The molecules show intra- and intermolecular hydrogen-bonding interactions of types N—H···N, C—H···N and C—H···O (Table 1).