



Supporting information
![]() | Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536811001139/bt5449sup1.cif |
![]() | Structure factor file (CIF format) https://doi.org/10.1107/S1600536811001139/bt5449Isup2.hkl |
CCDC reference: 811442
Key indicators
- Single-crystal X-ray study
- T = 298 K
- Mean
(C-C) = 0.004 Å
- R factor = 0.057
- wR factor = 0.119
- Data-to-parameter ratio = 17.5
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 PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 2 PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 11 PLAT913_ALERT_3_C Missing # of Very Strong Reflections in FCF .... 3 PLAT042_ALERT_1_C Calc. and Reported MoietyFormula Strings Differ ? PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L= 0.600 16
Alert level G PLAT083_ALERT_2_G SHELXL Second Parameter in WGHT Unusually Large. 5.06 PLAT794_ALERT_5_G Note: Tentative Bond Valency for Cu1 ....... 2.19
0 ALERT level A = In general: serious problem 1 ALERT level B = Potentially serious problem 5 ALERT level C = Check and explain 2 ALERT level G = General alerts; check 1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 1 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 1 ALERT type 4 Improvement, methodology, query or suggestion 1 ALERT type 5 Informative message, check
A solution of pyridine-2,6-dicarboxylic acid (pydcH2) (167 mg, 1 mmol) in 10 ml me thanol was added to a solution of 2-amino-4-methylpyridine (2a4mp) (216 mg, 0.6 mmol) in 10 ml me thanol and stirred for 4 hrs. Then a solution of Cu(NO3)2.3H2O (240 mg, 1 mmol) in 3 ml me thanol was added to the solution of pydcH2 and 2a4mp. To the resulted precipitate was added 1 ml of DMSO and stirred for several minutes under heating. By slove evaporation of this solution in room temprature, green crystals of the title compound were obtained after three week which were suitable for X-ray analysis (m.p 265–267 °C).
The hydrogen atoms of the N—H and NH2 groups were found in a difference Fourier map and refined isotropically without restraint. The C—H protons were positioned geometrically and refined as riding atoms with C—H = 0.93 Å and Uiso(H) = 1.2 Ueq(C) for aromatic C—H groups and C—H = 0.96 Å and Uiso(H) = 1.5 Ueq(C) for methyl group.
Data collection: X-AREA (Stoe & Cie, 2005); cell refinement: X-AREA (Stoe & Cie, 2005); data reduction: X-AREA (Stoe & Cie, 2005); 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, 1997); software used to prepare material for publication: WinGX (Farrugia, 1999).
(C6H9N2)2[Cu(C7H3NO4)2] | F(000) = 1260 |
Mr = 612.06 | Dx = 1.558 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 3509 reflections |
a = 24.034 (5) Å | θ = 2.9–29.2° |
b = 14.231 (3) Å | µ = 0.9 mm−1 |
c = 7.9780 (16) Å | T = 298 K |
β = 107.01 (3)° | Needle, blue |
V = 2609.3 (10) Å3 | 0.45 × 0.15 × 0.1 mm |
Z = 4 |
Stoe IPDS II diffractometer | 3509 independent reflections |
Radiation source: fine-focus sealed tube | 2785 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.061 |
Detector resolution: 0.15 mm pixels mm-1 | θmax = 29.2°, θmin = 2.9° |
rotation method scans | h = −30→32 |
Absorption correction: numerical [shape of crystal determined optically (X-RED32, Stoe & Cie, 2005)] | k = −19→16 |
Tmin = 0.743, Tmax = 0.846 | l = −10→10 |
8829 measured 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)] = 0.057 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.119 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.15 | w = 1/[σ2(Fo2) + (0.0336P)2 + 5.0605P] where P = (Fo2 + 2Fc2)/3 |
3509 reflections | (Δ/σ)max < 0.001 |
201 parameters | Δρmax = 0.39 e Å−3 |
0 restraints | Δρmin = −0.30 e Å−3 |
(C6H9N2)2[Cu(C7H3NO4)2] | V = 2609.3 (10) Å3 |
Mr = 612.06 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 24.034 (5) Å | µ = 0.9 mm−1 |
b = 14.231 (3) Å | T = 298 K |
c = 7.9780 (16) Å | 0.45 × 0.15 × 0.1 mm |
β = 107.01 (3)° |
Stoe IPDS II diffractometer | 3509 independent reflections |
Absorption correction: numerical [shape of crystal determined optically (X-RED32, Stoe & Cie, 2005)] | 2785 reflections with I > 2σ(I) |
Tmin = 0.743, Tmax = 0.846 | Rint = 0.061 |
8829 measured reflections |
R[F2 > 2σ(F2)] = 0.057 | 0 restraints |
wR(F2) = 0.119 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.15 | Δρmax = 0.39 e Å−3 |
3509 reflections | Δρmin = −0.30 e Å−3 |
201 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 | ||
C2 | 0.04362 (14) | 0.1040 (2) | 0.8614 (4) | 0.0350 (6) | |
O2 | 0.13708 (12) | 0.1246 (2) | 1.0589 (3) | 0.0592 (7) | |
O1 | 0.07172 (11) | 0.23932 (17) | 1.0341 (3) | 0.0475 (6) | |
C7 | 0.04400 (13) | 0.5659 (2) | 0.7068 (4) | 0.0338 (6) | |
H7 | 0.0734 | 0.5980 | 0.6770 | 0.041* | |
C8 | 0.0000 | 0.6143 (3) | 0.7500 | 0.0359 (9) | |
H8 | 0.0000 | 0.6796 | 0.7500 | 0.043* | |
Cu1 | 0.0000 | 0.29007 (3) | 0.7500 | 0.02835 (14) | |
N2 | 0.0000 | 0.4244 (2) | 0.7500 | 0.0266 (6) | |
N4 | 0.11686 (12) | 0.2123 (2) | 0.4309 (4) | 0.0461 (7) | |
O3 | 0.07121 (9) | 0.31454 (14) | 0.6690 (3) | 0.0370 (5) | |
N3 | 0.19892 (12) | 0.14346 (19) | 0.3935 (4) | 0.0388 (6) | |
N1 | 0.0000 | 0.1521 (2) | 0.7500 | 0.0318 (7) | |
C9 | 0.17056 (13) | 0.1785 (2) | 0.5020 (4) | 0.0345 (6) | |
C11 | 0.25320 (16) | 0.1393 (2) | 0.7462 (4) | 0.0444 (7) | |
C10 | 0.19805 (15) | 0.1743 (2) | 0.6831 (4) | 0.0420 (7) | |
H10 | 0.1786 | 0.1957 | 0.7608 | 0.050* | |
O4 | 0.12832 (10) | 0.43226 (18) | 0.6314 (3) | 0.0493 (6) | |
C6 | 0.04298 (11) | 0.46879 (19) | 0.7094 (3) | 0.0272 (5) | |
C5 | 0.08574 (12) | 0.4019 (2) | 0.6666 (4) | 0.0320 (6) | |
C13 | 0.28131 (16) | 0.1052 (3) | 0.6265 (5) | 0.0516 (9) | |
H13 | 0.3188 | 0.0808 | 0.6665 | 0.062* | |
C14 | 0.25339 (15) | 0.1082 (3) | 0.4529 (5) | 0.0485 (8) | |
H14 | 0.2719 | 0.0859 | 0.3734 | 0.058* | |
C12 | 0.2851 (2) | 0.1384 (3) | 0.9394 (5) | 0.0679 (12) | |
H12A | 0.3097 | 0.1927 | 0.9684 | 0.102* | |
H12B | 0.3084 | 0.0826 | 0.9675 | 0.102* | |
H12C | 0.2574 | 0.1393 | 1.0052 | 0.102* | |
C1 | 0.08860 (15) | 0.1616 (2) | 0.9957 (4) | 0.0395 (7) | |
C3 | 0.04539 (18) | 0.0064 (2) | 0.8605 (5) | 0.0485 (8) | |
H3 | 0.0770 | −0.0255 | 0.9339 | 0.058* | |
C4 | 0.0000 | −0.0425 (3) | 0.7500 | 0.0591 (15) | |
H4 | 0.0000 | −0.1079 | 0.7500 | 0.071* | |
H3A | 0.1810 (18) | 0.148 (3) | 0.275 (5) | 0.057 (11)* | |
H4B | 0.1012 (19) | 0.245 (3) | 0.501 (6) | 0.062 (12)* | |
H4A | 0.108 (2) | 0.225 (3) | 0.322 (7) | 0.074 (15)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
C2 | 0.0432 (17) | 0.0305 (14) | 0.0316 (14) | 0.0044 (12) | 0.0116 (13) | −0.0005 (11) |
O2 | 0.0498 (15) | 0.0694 (18) | 0.0477 (14) | 0.0226 (13) | −0.0024 (12) | −0.0063 (12) |
O1 | 0.0519 (14) | 0.0415 (13) | 0.0427 (12) | 0.0065 (11) | 0.0036 (11) | −0.0087 (10) |
C7 | 0.0291 (14) | 0.0305 (14) | 0.0372 (14) | −0.0073 (11) | 0.0026 (12) | 0.0014 (11) |
C8 | 0.033 (2) | 0.0240 (18) | 0.042 (2) | 0.000 | −0.0011 (18) | 0.000 |
Cu1 | 0.0325 (3) | 0.0218 (2) | 0.0336 (2) | 0.000 | 0.01408 (19) | 0.000 |
N2 | 0.0261 (16) | 0.0261 (15) | 0.0273 (15) | 0.000 | 0.0072 (13) | 0.000 |
N4 | 0.0400 (14) | 0.0526 (17) | 0.0444 (15) | 0.0111 (14) | 0.0100 (12) | −0.0122 (15) |
O3 | 0.0376 (11) | 0.0338 (11) | 0.0444 (11) | 0.0037 (9) | 0.0193 (10) | −0.0036 (9) |
N3 | 0.0367 (14) | 0.0414 (14) | 0.0378 (13) | 0.0074 (11) | 0.0102 (11) | −0.0009 (11) |
N1 | 0.042 (2) | 0.0233 (15) | 0.0304 (16) | 0.000 | 0.0112 (15) | 0.000 |
C9 | 0.0320 (14) | 0.0303 (13) | 0.0410 (15) | −0.0003 (11) | 0.0104 (12) | −0.0066 (11) |
C11 | 0.0478 (18) | 0.0351 (16) | 0.0440 (17) | −0.0024 (14) | 0.0033 (14) | −0.0012 (14) |
C10 | 0.0445 (18) | 0.0415 (16) | 0.0399 (16) | 0.0009 (14) | 0.0120 (14) | −0.0061 (13) |
O4 | 0.0357 (12) | 0.0546 (14) | 0.0658 (15) | −0.0093 (11) | 0.0279 (12) | −0.0084 (12) |
C6 | 0.0249 (13) | 0.0304 (13) | 0.0254 (11) | −0.0025 (10) | 0.0059 (10) | −0.0004 (10) |
C5 | 0.0304 (14) | 0.0357 (14) | 0.0305 (13) | −0.0020 (11) | 0.0098 (11) | −0.0030 (11) |
C13 | 0.0375 (18) | 0.049 (2) | 0.062 (2) | 0.0101 (15) | 0.0032 (16) | −0.0013 (16) |
C14 | 0.0394 (18) | 0.051 (2) | 0.058 (2) | 0.0144 (15) | 0.0181 (16) | −0.0010 (16) |
C12 | 0.080 (3) | 0.058 (2) | 0.049 (2) | 0.000 (2) | −0.008 (2) | 0.0008 (18) |
C1 | 0.0470 (18) | 0.0404 (17) | 0.0294 (14) | 0.0049 (14) | 0.0086 (13) | −0.0005 (12) |
C3 | 0.065 (2) | 0.0306 (15) | 0.0484 (18) | 0.0147 (15) | 0.0148 (17) | 0.0050 (13) |
C4 | 0.088 (4) | 0.022 (2) | 0.067 (3) | 0.000 | 0.022 (3) | 0.000 |
C2—N1 | 1.346 (3) | N3—C14 | 1.351 (4) |
C2—C3 | 1.390 (4) | N3—H3A | 0.92 (4) |
C2—C1 | 1.520 (4) | N1—C2i | 1.346 (3) |
O2—C1 | 1.243 (4) | C9—C10 | 1.403 (4) |
O1—C1 | 1.246 (4) | C11—C10 | 1.367 (5) |
C7—C6 | 1.382 (4) | C11—C13 | 1.407 (5) |
C7—C8 | 1.387 (4) | C11—C12 | 1.507 (5) |
C7—H7 | 0.9300 | C10—H10 | 0.9300 |
C8—C7i | 1.387 (4) | O4—C5 | 1.217 (3) |
C8—H8 | 0.9300 | C6—C5 | 1.511 (4) |
Cu1—N2 | 1.911 (3) | C13—C14 | 1.352 (5) |
Cu1—N1 | 1.964 (3) | C13—H13 | 0.9300 |
Cu1—O3 | 2.029 (2) | C14—H14 | 0.9300 |
Cu1—O3i | 2.029 (2) | C12—H12A | 0.9600 |
N2—C6 | 1.330 (3) | C12—H12B | 0.9600 |
N2—C6i | 1.330 (3) | C12—H12C | 0.9600 |
N4—C9 | 1.338 (4) | C3—C4 | 1.374 (5) |
N4—H4B | 0.89 (5) | C3—H3 | 0.9300 |
N4—H4A | 0.85 (5) | C4—C3i | 1.374 (5) |
O3—C5 | 1.292 (4) | C4—H4 | 0.9300 |
N3—C9 | 1.344 (4) | ||
N1—C2—C3 | 121.6 (3) | C10—C11—C12 | 121.8 (3) |
N1—C2—C1 | 116.5 (3) | C13—C11—C12 | 119.3 (3) |
C3—C2—C1 | 121.8 (3) | C11—C10—C9 | 120.5 (3) |
C6—C7—C8 | 118.3 (3) | C11—C10—H10 | 119.7 |
C6—C7—H7 | 120.8 | C9—C10—H10 | 119.7 |
C8—C7—H7 | 120.8 | N2—C6—C7 | 119.8 (3) |
C7i—C8—C7 | 120.5 (4) | N2—C6—C5 | 112.5 (2) |
C7i—C8—H8 | 119.8 | C7—C6—C5 | 127.6 (3) |
C7—C8—H8 | 119.8 | O4—C5—O3 | 126.4 (3) |
N2—Cu1—N1 | 180.000 (1) | O4—C5—C6 | 120.1 (3) |
N2—Cu1—O3 | 80.12 (6) | O3—C5—C6 | 113.5 (2) |
N1—Cu1—O3 | 99.88 (6) | C14—C13—C11 | 119.4 (3) |
N2—Cu1—O3i | 80.12 (6) | C14—C13—H13 | 120.3 |
N1—Cu1—O3i | 99.88 (6) | C11—C13—H13 | 120.3 |
O3—Cu1—O3i | 160.24 (12) | N3—C14—C13 | 120.7 (3) |
C6—N2—C6i | 123.2 (3) | N3—C14—H14 | 119.6 |
C6—N2—Cu1 | 118.39 (17) | C13—C14—H14 | 119.6 |
C6i—N2—Cu1 | 118.39 (17) | C11—C12—H12A | 109.5 |
C9—N4—H4B | 117 (3) | C11—C12—H12B | 109.5 |
C9—N4—H4A | 116 (3) | H12A—C12—H12B | 109.5 |
H4B—N4—H4A | 120 (4) | C11—C12—H12C | 109.5 |
C5—O3—Cu1 | 115.23 (17) | H12A—C12—H12C | 109.5 |
C9—N3—C14 | 122.2 (3) | H12B—C12—H12C | 109.5 |
C9—N3—H3A | 118 (3) | O2—C1—O1 | 127.6 (3) |
C14—N3—H3A | 120 (3) | O2—C1—C2 | 116.4 (3) |
C2i—N1—C2 | 118.9 (4) | O1—C1—C2 | 115.9 (3) |
C2i—N1—Cu1 | 120.56 (18) | C4—C3—C2 | 119.3 (3) |
C2—N1—Cu1 | 120.56 (18) | C4—C3—H3 | 120.3 |
N4—C9—N3 | 118.0 (3) | C2—C3—H3 | 120.3 |
N4—C9—C10 | 123.8 (3) | C3i—C4—C3 | 119.2 (4) |
N3—C9—C10 | 118.2 (3) | C3i—C4—H4 | 120.4 |
C10—C11—C13 | 118.8 (3) | C3—C4—H4 | 120.4 |
C6—C7—C8—C7i | −0.48 (18) | Cu1—N2—C6—C7 | 179.50 (19) |
O3—Cu1—N2—C6 | −2.65 (14) | C6i—N2—C6—C5 | −179.4 (2) |
O3i—Cu1—N2—C6 | 177.35 (14) | Cu1—N2—C6—C5 | 0.6 (2) |
O3—Cu1—N2—C6i | 177.35 (14) | C8—C7—C6—N2 | 1.0 (4) |
O3i—Cu1—N2—C6i | −2.65 (14) | C8—C7—C6—C5 | 179.7 (2) |
N2—Cu1—O3—C5 | 4.56 (19) | Cu1—O3—C5—O4 | 176.0 (3) |
N1—Cu1—O3—C5 | −175.44 (19) | Cu1—O3—C5—C6 | −5.4 (3) |
O3i—Cu1—O3—C5 | 4.56 (19) | N2—C6—C5—O4 | −178.1 (2) |
C3—C2—N1—C2i | 1.8 (2) | C7—C6—C5—O4 | 3.2 (5) |
C1—C2—N1—C2i | −174.4 (3) | N2—C6—C5—O3 | 3.2 (3) |
C3—C2—N1—Cu1 | −178.2 (2) | C7—C6—C5—O3 | −175.5 (3) |
C1—C2—N1—Cu1 | 5.6 (3) | C10—C11—C13—C14 | 0.3 (5) |
O3—Cu1—N1—C2i | −114.82 (16) | C12—C11—C13—C14 | −178.2 (4) |
O3i—Cu1—N1—C2i | 65.18 (16) | C9—N3—C14—C13 | 1.3 (5) |
O3—Cu1—N1—C2 | 65.18 (16) | C11—C13—C14—N3 | −0.1 (6) |
O3i—Cu1—N1—C2 | −114.82 (16) | N1—C2—C1—O2 | −157.6 (3) |
C14—N3—C9—N4 | 179.6 (3) | C3—C2—C1—O2 | 26.2 (5) |
C14—N3—C9—C10 | −2.6 (5) | N1—C2—C1—O1 | 24.9 (4) |
C13—C11—C10—C9 | −1.6 (5) | C3—C2—C1—O1 | −151.3 (3) |
C12—C11—C10—C9 | 176.8 (3) | N1—C2—C3—C4 | −3.6 (5) |
N4—C9—C10—C11 | −179.6 (3) | C1—C2—C3—C4 | 172.4 (3) |
N3—C9—C10—C11 | 2.7 (5) | C2—C3—C4—C3i | 1.7 (2) |
C6i—N2—C6—C7 | −0.50 (19) |
Symmetry code: (i) −x, y, −z+3/2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3A···O2ii | 0.92 (4) | 1.77 (4) | 2.662 (4) | 163 (4) |
N4—H4A···O1ii | 0.85 (5) | 2.22 (5) | 3.056 (4) | 170 (4) |
N4—H4B···O3 | 0.89 (5) | 1.97 (5) | 2.854 (4) | 176 (4) |
C7—H7···O1iii | 0.93 | 2.58 | 3.250 (4) | 130 |
C14—H14···O4iv | 0.93 | 2.42 | 3.160 (4) | 136 |
Symmetry codes: (ii) x, y, z−1; (iii) x, −y+1, z−1/2; (iv) −x+1/2, −y+1/2, −z+1. |
Experimental details
Crystal data | |
Chemical formula | (C6H9N2)2[Cu(C7H3NO4)2] |
Mr | 612.06 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 298 |
a, b, c (Å) | 24.034 (5), 14.231 (3), 7.9780 (16) |
β (°) | 107.01 (3) |
V (Å3) | 2609.3 (10) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.9 |
Crystal size (mm) | 0.45 × 0.15 × 0.1 |
Data collection | |
Diffractometer | Stoe IPDS II diffractometer |
Absorption correction | Numerical [shape of crystal determined optically (X-RED32, Stoe & Cie, 2005)] |
Tmin, Tmax | 0.743, 0.846 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 8829, 3509, 2785 |
Rint | 0.061 |
(sin θ/λ)max (Å−1) | 0.686 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.057, 0.119, 1.15 |
No. of reflections | 3509 |
No. of parameters | 201 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.39, −0.30 |
Computer programs: X-AREA (Stoe & Cie, 2005), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), ORTEP-3 for Windows (Farrugia, 1997), WinGX (Farrugia, 1999).
D—H···A | D—H | H···A | D···A | D—H···A |
N3—H3A···O2i | 0.92 (4) | 1.77 (4) | 2.662 (4) | 163 (4) |
N4—H4A···O1i | 0.85 (5) | 2.22 (5) | 3.056 (4) | 170 (4) |
N4—H4B···O3 | 0.89 (5) | 1.97 (5) | 2.854 (4) | 176 (4) |
C7—H7···O1ii | 0.93 | 2.58 | 3.250 (4) | 130 |
C14—H14···O4iii | 0.93 | 2.42 | 3.160 (4) | 136 |
Symmetry codes: (i) x, y, z−1; (ii) x, −y+1, z−1/2; (iii) −x+1/2, −y+1/2, −z+1. |
Polycarboxylate ligands are widely applied to assemble supramolecular network decorated by coordination bonds, van der Waals interactions, and π –π stacking. Due to the manifold N– and O-donors of pyridine or pyrazine-(di)carboxylic ligands, metal pyridine- or pyrazine dicarboxylates can contrast versatile structural motifs, which finally aggregate to generate various supramolecular architectures with interesting properties. As ones of the dicarboxylate ligands, pydcH2 have drawn extensive attentions. Continuing with our previous works on synthesizing coordination and proton transfer compounds (Aghabozorg et al. 2008, 2011), (Eshtiagh-Hosseini, Aghabozorg et al., 2010, Eshtiagh-Hosseini, Gschwind et al., 2010), (Sharif et al., 2010), herein, we planned the reaction between pydcH2, 2a4mp, and copperII nitrate trihydrate which resulted in the formation of (2a4mpH)+2.[Cu(pydc)2] crystals (Fig. 1). Crystal packing diagram related to the title compound is also rendered in the Fig. 2. In the anionic fragment, the CuII atom is six-coordinated by two nitrogen and four oxygen atoms from the carboxylate groups of two (pydc)2- ligands, with bond length ranges of 1.911 (3)–2.029 (2) Å. The N1—Cu1—N2 [180.000 (1)°], O1—Cu1—O1 [146.67 (5)°] and O3—Cu1—O3 [160.23 (5)°] angles. The coordination environment around CuII is distorted octahedral. In the crystal structure of the title compound, there are intermolecular C—H···O and N—H···O hydrogen bonds (Table 1) and also π-π contacts between pyridine rings of (2a4mpH)+ with centroid-centroid distance Cg1···Cg1i equel to 3.573 (2) Å [symmetry code: (i) 2 - x, 2 - y,1 - z, where Cg1 is the centroid of ring N3/C9—C11/C13—C14]. (Fig. 2) stabilize the structure.