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A structure consisting of alternating organic and inorganic layers is exhibited by the title compound, C6H16N22+·2Br-. The ammonium groups and bromide anions inter­act via hydrogen bonds to form a two-dimensional hydrogen-bond network.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536806047908/fl2078sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S1600536806047908/fl2078Isup2.hkl
Contains datablock I

CCDC reference: 629677

Key indicators

  • Single-crystal X-ray study
  • T = 295 K
  • Mean [sigma](C-C) = 0.005 Å
  • R factor = 0.049
  • wR factor = 0.113
  • Data-to-parameter ratio = 35.8

checkCIF/PLATON results

No syntax errors found



Alert level C PLAT764_ALERT_4_C Overcomplete CIF Bond List Detected (Rep/Expd) . 1.25 Ratio
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 1 ALERT level C = Check and explain 0 ALERT level G = General alerts; check 0 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 0 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check

Computing details top

Data collection: CrysAlis CCD (Oxford Diffraction, 2006); cell refinement: CrysAlis RED (Oxford Diffraction, 2006); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and Mercury (Macrae et al., 2006); software used to prepare material for publication: PLATON (Spek, 2003) and WinGX (Farrugia, 1999).

trans-1,4-Diaminocyclohexane dihydrobromide top
Crystal data top
C6H16N22+·2BrF(000) = 544
Mr = 276.03Dx = 1.754 Mg m3
Orthorhombic, PbcaMo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ac 2abCell parameters from 3526 reflections
a = 7.4264 (6) Åθ = 3.8–31.8°
b = 8.9074 (6) ŵ = 7.70 mm1
c = 15.8018 (14) ÅT = 295 K
V = 1045.29 (14) Å3Block, colourless
Z = 40.40 × 0.30 × 0.20 mm
Data collection top
Oxford Excalibur2
diffractometer
1683 independent reflections
Radiation source: fine-focus sealed tube1118 reflections with I > 2σ(I)
Graphite monochromatorRint = 0.043
ω–2θ scansθmax = 31.9°, θmin = 3.8°
Absorption correction: multi-scan
(Blessing, 1995)
h = 108
Tmin = 0.074, Tmax = 0.216k = 1313
8858 measured reflectionsl = 2322
Refinement top
Refinement on F2Secondary atom site location: difference Fourier map
Least-squares matrix: fullHydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.049H-atom parameters constrained
wR(F2) = 0.113 w = 1/[σ2(Fo2) + (0.0375P)2 + 2.6029P]
where P = (Fo2 + 2Fc2)/3
S = 1.08(Δ/σ)max = 0.001
1683 reflectionsΔρmax = 0.66 e Å3
47 parametersΔρmin = 0.76 e Å3
0 restraintsExtinction correction: SHELXL97, Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methodsExtinction coefficient: 0.049 (2)
Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/Ueq
N10.0929 (4)0.6423 (3)0.34426 (19)0.0329 (7)
H1A0.04090.60530.29800.049*
H1B0.08660.74210.34330.049*
H1C0.20780.61400.34580.049*
C10.0021 (5)0.5845 (4)0.4208 (2)0.0269 (7)
H10.12780.61790.41920.032*
C20.0024 (5)0.4137 (4)0.4208 (2)0.0321 (8)
H2A0.05990.37620.37120.039*
H2B0.12630.37960.41820.039*
C30.0872 (6)0.6484 (4)0.4994 (2)0.0295 (8)
H3A0.21400.62220.49950.035*
H3B0.07750.75700.49890.035*
Br10.01149 (5)0.00436 (4)0.34632 (2)0.03611 (19)
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
N10.0425 (17)0.0307 (15)0.0257 (15)0.0031 (13)0.0011 (14)0.0016 (13)
C10.0269 (16)0.0254 (14)0.0283 (18)0.0035 (14)0.002 (2)0.0037 (12)
C20.044 (2)0.0213 (13)0.0306 (19)0.0007 (15)0.003 (2)0.0076 (13)
C30.0342 (19)0.0236 (15)0.0306 (18)0.0054 (16)0.0020 (14)0.0048 (13)
Br10.0400 (3)0.0321 (2)0.0362 (3)0.0032 (2)0.00133 (15)0.00489 (16)
Geometric parameters (Å, º) top
N1—C11.492 (4)C2—C3i1.529 (5)
N1—H1A0.8900C2—H2A0.9700
N1—H1B0.8900C2—H2B0.9700
N1—H1C0.8900C3—C2i1.529 (5)
C1—C31.518 (5)C3—H3A0.9700
C1—C21.521 (5)C3—H3B0.9700
C1—H10.9800
C1—N1—H1A109.5C1—C2—C3i110.6 (3)
C1—N1—H1B109.5C1—C2—H2A109.5
H1A—N1—H1B109.5C3i—C2—H2A109.5
C1—N1—H1C109.5C1—C2—H2B109.5
H1A—N1—H1C109.5C3i—C2—H2B109.5
H1B—N1—H1C109.5H2A—C2—H2B108.1
N1—C1—C3109.1 (3)C1—C3—C2i110.4 (3)
N1—C1—C2109.6 (3)C1—C3—H3A109.6
C3—C1—C2111.4 (3)C2i—C3—H3A109.6
N1—C1—H1108.9C1—C3—H3B109.6
C3—C1—H1108.9C2i—C3—H3B109.6
C2—C1—H1108.9H3A—C3—H3B108.1
N1—C1—C2—C3i177.6 (3)N1—C1—C3—C2i177.8 (3)
C3—C1—C2—C3i56.8 (5)C2—C1—C3—C2i56.7 (5)
Symmetry code: (i) x, y+1, z+1.
Hydrogen-bond geometry (Å, º) top
D—H···AD—HH···AD···AD—H···A
N1—H1A···Br1ii0.892.463.308 (3)159
N1—H1B···Br1iii0.892.453.317 (3)166
N1—H1C···Br1iv0.892.463.343 (3)173
Symmetry codes: (ii) x, y+1/2, z+1/2; (iii) x, y+1, z; (iv) x1/2, y+1/2, z.
 

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