Bis[5-(pyridin-2-yl)pyrazine-2-carbo-nitrile-κN,N]silver hexa-fluorido-phosphate.

In the mononuclear title complex, [Ag(C(10)H(6)N(4))(2)]PF(6), two κ(2)N,N'-chelating 5-(pyridin-2-yl)pyrazine-2-carbonitrile ligands surround the Ag(I) atom, forming a distorted N(4) tetra-hedral coordination geometry. The mononuclear units are inter-connected through π-π inter-actions [centroid-centroid distances = 3.801 (2) and 3.979 (3) Å] and the hexa-fluoridophosphate anions are embedded within the inter-stices. C N⋯π inter-actions [N⋯centroid = 3.519 (2) Å] and C-H.⋯N hydrogen-bonding inter-actions also occur.

Related literature

For coordination complexes with pyridyl-based ligands, see: Boudalis et al. (2003 ▶); Dunne et al. (1997 ▶); Huang et al. (2007 ▶); Wang et al. (2009 ▶). For a related complex with 5-(2-pyrid­yl)pyrazine-2-carbonitrile, see: Wang et al. (2010 ▶).

Experimental

Crystal data

[Ag(C10H6N4)2]PF6

M = 617.22

Triclinic,

a = 8.8989 (9) Å

b = 9.1711 (10) Å

c = 14.0804 (15) Å

α = 77.023 (2)°

β = 86.926 (2)°

γ = 84.809 (2)°

V = 1114.5 (2) Å3

Z = 2

Mo Kα radiation

μ = 1.05 mm−1

T = 293 K

0.38 × 0.30 × 0.30 mm

Data collection

Bruker APEXII CCD area-detector diffractometer

Absorption correction: multi-scan (SADABS; Bruker, 2007 ▶) T min = 0.861, T max = 1.000

8106 measured reflections

5438 independent reflections

4544 reflections with I > 2σ(I)

R int = 0.017

Refinement

R[F 2 > 2σ(F 2)] = 0.032

wR(F 2) = 0.090

S = 1.04

5438 reflections

325 parameters

H-atom parameters constrained

Δρmax = 0.71 e Å−3

Δρmin = −0.37 e Å−3

Data collection: APEX2 (Bruker, 2007 ▶); cell refinement: SAINT (Bruker, 2007 ▶); data reduction: SAINT; 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 and PLATON (Spek, 2009 ▶).

Crystal structure: contains datablock(s) I, global. DOI: 10.1107/S1600536811051403/bt5734sup1.cif

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536811051403/bt5734Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

[Ag(C10H6N4)2]PF6	Z = 2
Mr = 617.22	F(000) = 608
Triclinic, P1	Dx = 1.839 Mg m−3
a = 8.8989 (9) Å	Mo Kα radiation, λ = 0.71073 Å
b = 9.1711 (10) Å	Cell parameters from 252 reflections
c = 14.0804 (15) Å	θ = 2.3–28.3°
α = 77.023 (2)°	µ = 1.05 mm−1
β = 86.926 (2)°	T = 293 K
γ = 84.809 (2)°	Block, colorless
V = 1114.5 (2) Å3	0.38 × 0.30 × 0.30 mm

Bruker APEXII CCD area-detector diffractometer	5438 independent reflections
Radiation source: fine-focus sealed tube	4544 reflections with I > 2σ(I)
graphite	Rint = 0.017
ω scans	θmax = 28.3°, θmin = 2.3°
Absorption correction: multi-scan (SADABS; Bruker, 2007)	h = −11→11
Tmin = 0.861, Tmax = 1.000	k = −12→11
8106 measured reflections	l = −14→18

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)] = 0.032	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.090	H-atom parameters constrained
S = 1.04	w = 1/[σ2(Fo2) + (0.0427P)2 + 0.4779P] P = (Fo2 + 2Fc2)/3
5438 reflections	(Δ/σ)max = 0.001
325 parameters	Δρmax = 0.71 e Å−3
0 restraints	Δρmin = −0.37 e Å−3

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds 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 > 2sigma(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
Ag1	0.48500 (2)	0.72149 (2)	0.719902 (13)	0.05876 (9)
N1	0.5186 (2)	0.8140 (2)	0.85560 (14)	0.0472 (4)
N2	0.2770 (2)	0.6575 (2)	0.83133 (14)	0.0488 (4)
N3	0.0214 (2)	0.6780 (2)	0.95255 (15)	0.0519 (5)
N4	0.6022 (2)	0.6137 (2)	0.60099 (14)	0.0421 (4)
N5	0.3774 (2)	0.8372 (2)	0.55962 (13)	0.0417 (4)
N6	0.3283 (2)	0.9988 (2)	0.37004 (15)	0.0512 (5)
N7	−0.2337 (3)	0.5344 (3)	0.8368 (2)	0.0701 (7)
N8	0.0293 (3)	1.2382 (3)	0.4069 (2)	0.0654 (6)
C1	0.6476 (3)	0.8679 (3)	0.8722 (2)	0.0577 (6)
H1A	0.7109	0.9045	0.8191	0.069*
C2	0.6908 (3)	0.8716 (4)	0.9636 (2)	0.0644 (7)
H2A	0.7806	0.9108	0.9722	0.077*
C3	0.5984 (4)	0.8163 (4)	1.0420 (2)	0.0747 (9)
H3A	0.6266	0.8143	1.1049	0.090*
C4	0.4630 (3)	0.7635 (4)	1.0269 (2)	0.0659 (7)
H4A	0.3982	0.7273	1.0793	0.079*
C5	0.4258 (3)	0.7655 (3)	0.93238 (17)	0.0471 (5)
C6	0.2814 (3)	0.7132 (3)	0.91130 (15)	0.0429 (5)
C7	0.1518 (3)	0.7245 (3)	0.97008 (17)	0.0494 (5)
H7A	0.1570	0.7666	1.0239	0.059*
C8	0.1461 (3)	0.6118 (3)	0.81258 (18)	0.0526 (6)
H8A	0.1394	0.5724	0.7577	0.063*
C9	0.0207 (3)	0.6218 (3)	0.87300 (18)	0.0478 (5)
C10	−0.1216 (3)	0.5724 (3)	0.8523 (2)	0.0555 (6)
C11	0.7058 (3)	0.4967 (3)	0.62202 (18)	0.0493 (5)
H11A	0.7194	0.4500	0.6871	0.059*
C12	0.7931 (3)	0.4422 (3)	0.5521 (2)	0.0531 (6)
H12A	0.8631	0.3601	0.5696	0.064*
C13	0.7749 (3)	0.5111 (3)	0.4566 (2)	0.0551 (6)
H13A	0.8345	0.4784	0.4080	0.066*
C14	0.6665 (3)	0.6305 (3)	0.43296 (18)	0.0474 (5)
H14A	0.6512	0.6779	0.3681	0.057*
C15	0.5814 (2)	0.6782 (2)	0.50681 (15)	0.0346 (4)
C16	0.4612 (2)	0.8042 (2)	0.48494 (15)	0.0345 (4)
C17	0.4369 (3)	0.8876 (3)	0.39062 (17)	0.0487 (5)
H17A	0.4991	0.8647	0.3398	0.058*
C18	0.2663 (2)	0.9470 (3)	0.53981 (18)	0.0453 (5)
H18A	0.2047	0.9712	0.5904	0.054*
C19	0.2421 (2)	1.0246 (2)	0.44564 (17)	0.0407 (4)
C20	0.1224 (3)	1.1448 (3)	0.4237 (2)	0.0494 (5)
P1	0.04799 (7)	1.12551 (7)	0.76794 (5)	0.04787 (15)
F5	0.0408 (3)	1.1620 (2)	0.65229 (13)	0.0903 (6)
F4	0.2221 (2)	1.0737 (3)	0.75732 (16)	0.0945 (7)
F3	−0.1266 (2)	1.1778 (3)	0.77714 (17)	0.0920 (6)
F6	0.0579 (3)	1.0844 (3)	0.88231 (14)	0.1011 (7)
F1	0.0880 (3)	1.2901 (2)	0.7634 (2)	0.1208 (9)
F2	0.0083 (3)	0.9602 (2)	0.77003 (17)	0.0918 (6)

	U11	U22	U33	U12	U13	U23
Ag1	0.06857 (14)	0.07215 (15)	0.03810 (11)	−0.00412 (10)	0.00886 (8)	−0.02065 (9)
N1	0.0422 (10)	0.0584 (12)	0.0420 (10)	0.0000 (8)	0.0002 (8)	−0.0152 (9)
N2	0.0525 (11)	0.0576 (12)	0.0382 (10)	−0.0042 (9)	0.0012 (8)	−0.0152 (8)
N3	0.0503 (11)	0.0603 (12)	0.0461 (11)	−0.0050 (9)	0.0022 (9)	−0.0146 (9)
N4	0.0423 (9)	0.0452 (10)	0.0400 (9)	0.0016 (8)	−0.0038 (7)	−0.0136 (8)
N5	0.0372 (9)	0.0492 (10)	0.0403 (9)	0.0015 (7)	0.0019 (7)	−0.0156 (8)
N6	0.0467 (10)	0.0569 (12)	0.0464 (11)	0.0084 (9)	−0.0023 (8)	−0.0088 (9)
N7	0.0617 (14)	0.0812 (17)	0.0726 (16)	−0.0124 (13)	−0.0100 (12)	−0.0234 (13)
N8	0.0524 (12)	0.0628 (14)	0.0816 (17)	0.0149 (11)	−0.0132 (12)	−0.0223 (12)
C1	0.0458 (13)	0.0699 (17)	0.0585 (15)	−0.0028 (12)	0.0013 (11)	−0.0181 (13)
C2	0.0472 (13)	0.083 (2)	0.0680 (18)	−0.0040 (13)	−0.0085 (12)	−0.0263 (15)
C3	0.0706 (18)	0.109 (3)	0.0515 (16)	−0.0126 (17)	−0.0169 (14)	−0.0258 (16)
C4	0.0655 (16)	0.096 (2)	0.0383 (13)	−0.0135 (15)	−0.0038 (11)	−0.0151 (13)
C5	0.0469 (12)	0.0547 (13)	0.0395 (11)	−0.0005 (10)	−0.0023 (9)	−0.0114 (10)
C6	0.0481 (11)	0.0473 (12)	0.0322 (10)	−0.0012 (9)	−0.0012 (8)	−0.0071 (9)
C7	0.0528 (13)	0.0593 (14)	0.0382 (11)	−0.0051 (11)	0.0016 (9)	−0.0156 (10)
C8	0.0591 (14)	0.0607 (14)	0.0415 (12)	−0.0079 (11)	−0.0018 (10)	−0.0175 (11)
C9	0.0507 (12)	0.0477 (12)	0.0437 (12)	−0.0036 (10)	−0.0045 (10)	−0.0064 (10)
C10	0.0570 (15)	0.0587 (15)	0.0513 (14)	−0.0068 (12)	−0.0052 (11)	−0.0116 (11)
C11	0.0507 (13)	0.0499 (13)	0.0471 (13)	0.0053 (10)	−0.0126 (10)	−0.0114 (10)
C12	0.0461 (12)	0.0479 (13)	0.0665 (16)	0.0111 (10)	−0.0114 (11)	−0.0189 (12)
C13	0.0518 (13)	0.0567 (14)	0.0570 (15)	0.0116 (11)	0.0060 (11)	−0.0214 (12)
C14	0.0487 (12)	0.0505 (13)	0.0420 (12)	0.0065 (10)	0.0043 (9)	−0.0134 (10)
C15	0.0311 (9)	0.0349 (9)	0.0395 (10)	−0.0028 (7)	0.0001 (7)	−0.0121 (8)
C16	0.0302 (9)	0.0368 (10)	0.0389 (10)	−0.0037 (7)	0.0001 (7)	−0.0137 (8)
C17	0.0461 (12)	0.0562 (13)	0.0402 (12)	0.0100 (10)	0.0041 (9)	−0.0098 (10)
C18	0.0372 (10)	0.0525 (13)	0.0480 (12)	0.0043 (9)	0.0032 (9)	−0.0194 (10)
C19	0.0310 (9)	0.0394 (10)	0.0540 (13)	−0.0015 (8)	−0.0045 (8)	−0.0148 (9)
C20	0.0384 (11)	0.0507 (13)	0.0610 (15)	0.0020 (10)	−0.0063 (10)	−0.0176 (11)
P1	0.0530 (3)	0.0482 (3)	0.0428 (3)	−0.0012 (3)	0.0021 (2)	−0.0128 (3)
F5	0.1156 (16)	0.0957 (14)	0.0469 (9)	0.0363 (12)	−0.0066 (10)	−0.0060 (9)
F4	0.0560 (10)	0.1330 (19)	0.0913 (15)	0.0151 (11)	−0.0017 (10)	−0.0271 (13)
F3	0.0626 (11)	0.1042 (15)	0.1056 (16)	0.0126 (10)	0.0113 (10)	−0.0262 (13)
F6	0.1187 (17)	0.140 (2)	0.0472 (10)	−0.0087 (15)	−0.0014 (10)	−0.0267 (11)
F1	0.146 (2)	0.0698 (13)	0.160 (2)	−0.0404 (14)	0.0392 (18)	−0.0522 (15)
F2	0.1197 (17)	0.0551 (10)	0.1022 (16)	−0.0126 (10)	−0.0138 (13)	−0.0163 (10)

Ag1—N4	2.2887 (18)	C5—C6	1.478 (3)
Ag1—N1	2.301 (2)	C6—C7	1.393 (3)
Ag1—N2	2.389 (2)	C7—H7A	0.9300
Ag1—N5	2.4714 (19)	C8—C9	1.376 (4)
N1—C5	1.343 (3)	C8—H8A	0.9300
N1—C1	1.342 (3)	C9—C10	1.448 (4)
N2—C8	1.331 (3)	C11—C12	1.374 (4)
N2—C6	1.340 (3)	C11—H11A	0.9300
N3—C7	1.326 (3)	C12—C13	1.362 (4)
N3—C9	1.334 (3)	C12—H12A	0.9300
N4—C15	1.341 (3)	C13—C14	1.386 (3)
N4—C11	1.341 (3)	C13—H13A	0.9300
N5—C16	1.331 (3)	C14—C15	1.381 (3)
N5—C18	1.339 (3)	C14—H14A	0.9300
N6—C19	1.330 (3)	C15—C16	1.492 (3)
N6—C17	1.333 (3)	C16—C17	1.393 (3)
N7—C10	1.134 (4)	C17—H17A	0.9300
N8—C20	1.131 (3)	C18—C19	1.375 (3)
C1—C2	1.371 (4)	C18—H18A	0.9300
C1—H1A	0.9300	C19—C20	1.454 (3)
C2—C3	1.371 (5)	P1—F1	1.568 (2)
C2—H2A	0.9300	P1—F6	1.575 (2)
C3—C4	1.382 (4)	P1—F2	1.5812 (19)
C3—H3A	0.9300	P1—F4	1.5883 (19)
C4—C5	1.385 (3)	P1—F5	1.5906 (18)
C4—H4A	0.9300	P1—F3	1.5908 (19)
N4—Ag1—N1	145.43 (7)	C8—C9—C10	121.0 (2)
N4—Ag1—N2	133.18 (7)	N7—C10—C9	179.3 (3)
N1—Ag1—N2	72.30 (7)	N4—C11—C12	123.3 (2)
N4—Ag1—N5	69.52 (6)	N4—C11—H11A	118.4
N1—Ag1—N5	132.63 (7)	C12—C11—H11A	118.4
N2—Ag1—N5	106.77 (7)	C13—C12—C11	118.6 (2)
C5—N1—C1	118.0 (2)	C13—C12—H12A	120.7
C5—N1—Ag1	115.17 (16)	C11—C12—H12A	120.7
C1—N1—Ag1	123.14 (16)	C12—C13—C14	119.1 (2)
C8—N2—C6	117.4 (2)	C12—C13—H13A	120.4
C8—N2—Ag1	127.48 (16)	C14—C13—H13A	120.4
C6—N2—Ag1	112.57 (15)	C15—C14—C13	119.2 (2)
C7—N3—C9	115.6 (2)	C15—C14—H14A	120.4
C15—N4—C11	117.90 (19)	C13—C14—H14A	120.4
C15—N4—Ag1	119.88 (13)	N4—C15—C14	121.82 (19)
C11—N4—Ag1	121.75 (15)	N4—C15—C16	117.00 (17)
C16—N5—C18	117.68 (19)	C14—C15—C16	121.18 (19)
C16—N5—Ag1	113.32 (13)	N5—C16—C17	120.12 (19)
C18—N5—Ag1	127.61 (14)	N5—C16—C15	117.60 (18)
C19—N6—C17	115.7 (2)	C17—C16—C15	122.27 (18)
N1—C1—C2	123.2 (3)	N6—C17—C16	122.8 (2)
N1—C1—H1A	118.4	N6—C17—H17A	118.6
C2—C1—H1A	118.4	C16—C17—H17A	118.6
C1—C2—C3	118.5 (3)	N5—C18—C19	120.9 (2)
C1—C2—H2A	120.8	N5—C18—H18A	119.6
C3—C2—H2A	120.8	C19—C18—H18A	119.6
C2—C3—C4	119.6 (3)	N6—C19—C18	122.76 (19)
C2—C3—H3A	120.2	N6—C19—C20	116.0 (2)
C4—C3—H3A	120.2	C18—C19—C20	121.2 (2)
C3—C4—C5	118.7 (3)	N8—C20—C19	179.9 (3)
C3—C4—H4A	120.7	F1—P1—F6	91.37 (15)
C5—C4—H4A	120.7	F1—P1—F2	178.75 (15)
N1—C5—C4	122.0 (2)	F6—P1—F2	89.84 (13)
N1—C5—C6	116.7 (2)	F1—P1—F4	90.26 (15)
C4—C5—C6	121.3 (2)	F6—P1—F4	90.18 (13)
N2—C6—C7	120.2 (2)	F2—P1—F4	89.45 (13)
N2—C6—C5	117.8 (2)	F1—P1—F5	89.97 (15)
C7—C6—C5	121.9 (2)	F6—P1—F5	178.18 (13)
N3—C7—C6	122.9 (2)	F2—P1—F5	88.81 (12)
N3—C7—H7A	118.6	F4—P1—F5	88.57 (11)
C6—C7—H7A	118.6	F1—P1—F3	89.76 (14)
N2—C8—C9	121.1 (2)	F6—P1—F3	90.52 (13)
N2—C8—H8A	119.4	F2—P1—F3	90.52 (13)
C9—C8—H8A	119.4	F4—P1—F3	179.29 (12)
N3—C9—C8	122.9 (2)	F5—P1—F3	90.72 (12)
N3—C9—C10	116.1 (2)
N4—Ag1—N1—C5	−132.25 (17)	C4—C5—C6—C7	29.9 (4)
N2—Ag1—N1—C5	11.13 (16)	C9—N3—C7—C6	−1.4 (4)
N5—Ag1—N1—C5	107.90 (18)	N2—C6—C7—N3	2.1 (4)
N4—Ag1—N1—C1	25.6 (3)	C5—C6—C7—N3	−179.8 (2)
N2—Ag1—N1—C1	169.0 (2)	C6—N2—C8—C9	0.1 (4)
N5—Ag1—N1—C1	−94.3 (2)	Ag1—N2—C8—C9	−160.13 (19)
N4—Ag1—N2—C8	−43.4 (3)	C7—N3—C9—C8	0.2 (4)
N1—Ag1—N2—C8	164.3 (2)	C7—N3—C9—C10	−179.2 (2)
N5—Ag1—N2—C8	34.0 (2)	N2—C8—C9—N3	0.5 (4)
N4—Ag1—N2—C6	155.58 (14)	N2—C8—C9—C10	179.8 (2)
N1—Ag1—N2—C6	3.24 (16)	N3—C9—C10—N7	11 (29)
N5—Ag1—N2—C6	−127.02 (16)	C8—C9—C10—N7	−169 (100)
N1—Ag1—N4—C15	−124.46 (16)	C15—N4—C11—C12	1.3 (4)
N2—Ag1—N4—C15	106.73 (17)	Ag1—N4—C11—C12	−170.83 (19)
N5—Ag1—N4—C15	12.60 (15)	N4—C11—C12—C13	0.7 (4)
N1—Ag1—N4—C11	47.6 (2)	C11—C12—C13—C14	−1.9 (4)
N2—Ag1—N4—C11	−81.3 (2)	C12—C13—C14—C15	1.1 (4)
N5—Ag1—N4—C11	−175.4 (2)	C11—N4—C15—C14	−2.2 (3)
N4—Ag1—N5—C16	−14.09 (14)	Ag1—N4—C15—C14	170.13 (17)
N1—Ag1—N5—C16	134.22 (14)	C11—N4—C15—C16	177.62 (19)
N2—Ag1—N5—C16	−144.66 (14)	Ag1—N4—C15—C16	−10.1 (2)
N4—Ag1—N5—C18	179.8 (2)	C13—C14—C15—N4	1.0 (3)
N1—Ag1—N5—C18	−31.9 (2)	C13—C14—C15—C16	−178.8 (2)
N2—Ag1—N5—C18	49.2 (2)	C18—N5—C16—C17	3.1 (3)
C5—N1—C1—C2	1.9 (4)	Ag1—N5—C16—C17	−164.53 (17)
Ag1—N1—C1—C2	−155.3 (2)	C18—N5—C16—C15	−177.86 (18)
N1—C1—C2—C3	0.7 (5)	Ag1—N5—C16—C15	14.5 (2)
C1—C2—C3—C4	−2.2 (5)	N4—C15—C16—N5	−4.1 (3)
C2—C3—C4—C5	1.2 (5)	C14—C15—C16—N5	175.7 (2)
C1—N1—C5—C4	−3.0 (4)	N4—C15—C16—C17	174.9 (2)
Ag1—N1—C5—C4	156.0 (2)	C14—C15—C16—C17	−5.3 (3)
C1—N1—C5—C6	177.3 (2)	C19—N6—C17—C16	−0.9 (4)
Ag1—N1—C5—C6	−23.7 (3)	N5—C16—C17—N6	−2.1 (4)
C3—C4—C5—N1	1.5 (5)	C15—C16—C17—N6	178.9 (2)
C3—C4—C5—C6	−178.8 (3)	C16—N5—C18—C19	−1.2 (3)
C8—N2—C6—C7	−1.3 (3)	Ag1—N5—C18—C19	164.36 (16)
Ag1—N2—C6—C7	161.78 (18)	C17—N6—C19—C18	2.8 (3)
C8—N2—C6—C5	−179.5 (2)	C17—N6—C19—C20	−179.4 (2)
Ag1—N2—C6—C5	−16.4 (3)	N5—C18—C19—N6	−1.8 (4)
N1—C5—C6—N2	27.7 (3)	N5—C18—C19—C20	−179.5 (2)
C4—C5—C6—N2	−152.0 (3)	N6—C19—C20—N8	−163 (100)
N1—C5—C6—C7	−150.4 (2)	C18—C19—C20—N8	14 (100)

D—H···A	D—H	H···A	D···A	D—H···A
C11—H11A···N7i	0.93	2.47	3.201 (2)	135

C≡N···Cg	C···Cg (Å)	N···Cg (Å)	sym. code
C20 N8 Cg2	3.509 (3)	3.519 (2)	-x+1,-y+2,-z+1

Table 1

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C11—H11A⋯N7i	0.93	2.47	3.201 (2)	135

Symmetry code: (i) .