Synthesis, crystal structure and thermal properties of poly[[μ-1,2-bis­(pyridin-4-yl)ethene-κ2N:N′-μ-bromido-copper(I)] 1,2-bis­(pyridin-4-yl)ethene 0.25-solvate]

Näther, C.; Müller-Meinhard, A.; Jess, I.

doi:10.1107/S205698902300885X

Synthesis, crystal structure and thermal properties of poly[[μ-1,2-bis(pyridin-4-yl)ethene-κ²N:N′-μ-bromido-copper(I)] 1,2-bis(pyridin-4-yl)ethene 0.25-solvate]

C. Näther, A. Müller-Meinhard and I. Jess

In the crystal structure of the title compound, the copper(I) cations are tetrahededrally coordinated and linked by pairs of bromide anions into dinuclear units that are further connected into layers by the 1,2-bis(pyridin-4-yl)ethene (4-bpe) coligands. The layers are stacked so that cavities are formed in which disordered 4-bpe molecules are embedded.

Keywords: crystal structure; synthesis; thermal properties; copper(I); 1,2-bis(pyridin-4-yl)ethene.

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Supporting information

	Crystallographic Information File (CIF) https://doi.org/10.1107/S205698902300885X/hb8078sup1.cif Contains datablock I
	Structure factor file (CIF format) https://doi.org/10.1107/S205698902300885X/hb8078Isup2.hkl Contains datablock I
	Portable Network Graphics (PNG) image https://doi.org/10.1107/S205698902300885X/hb8078sup3.png Experimental (top) and calculated powder pattern (bottom) of the title compound.
	Portable Network Graphics (PNG) image https://doi.org/10.1107/S205698902300885X/hb8078sup4.png Experimental powder pattern of the residue obtained after the first mass loss in a TG measurement of the title compound (top) and calculated powder pattern for (CuBR)2(4-bpe) retrieved from literature.
	Portable Network Graphics (PNG) image https://doi.org/10.1107/S205698902300885X/hb8078sup5.png IR spectrum of the title compound. The values of the most prominent vibrations are given.

CCDC reference: 2300129

checkCIF report

Key indicators

Structure: I

Single-crystal X-ray study
T = 100 K
Mean (C-C) = 0.005 Å
Disorder in solvent or counterion
R factor = 0.029
wR factor = 0.076
Data-to-parameter ratio = 13.4

checkCIF/PLATON results

No syntax errors found



Alert level C
PLAT041_ALERT_1_C Calc. and Reported SumFormula    Strings  Differ     Please Check
PLAT042_ALERT_1_C Calc. and Reported MoietyFormula Strings  Differ     Please Check
PLAT043_ALERT_1_C Calculated and Reported Mol. Weight Differ by ..       1.01 Check
PLAT213_ALERT_2_C Atom C1              has ADP max/min Ratio .....        3.2 prolat
PLAT213_ALERT_2_C Atom C2              has ADP max/min Ratio .....        3.5 prolat
PLAT220_ALERT_2_C NonSolvent   Resd 1  C   Ueq(max)/Ueq(min) Range        3.3 Ratio
PLAT241_ALERT_2_C High   'MainMol' Ueq as Compared to Neighbors of         C1 Check
PLAT241_ALERT_2_C High   'MainMol' Ueq as Compared to Neighbors of         C2 Check
PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor ....        2.7 Note
PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor ....        3.0 Note
PLAT911_ALERT_3_C Missing FCF Refl Between Thmin & STh/L=    0.600         20 Report

Alert level G
PLAT002_ALERT_2_G Number of Distance or Angle Restraints on AtSite         14 Note
PLAT004_ALERT_5_G Polymeric Structure Found with Maximum Dimension          2 Info
PLAT045_ALERT_1_G Calculated and Reported Z Differ by a Factor ...      0.500 Check
PLAT175_ALERT_4_G The CIF-Embedded .res File Contains SAME Records          1 Report
PLAT189_ALERT_3_G A Non-default SAME Restraint Value for SecondPar     0.0400 Report
PLAT232_ALERT_2_G Hirshfeld Test Diff (M-X)  Br1      --Cu1      .       20.0 s.u.
PLAT232_ALERT_2_G Hirshfeld Test Diff (M-X)  Br1      --Cu1_b    .       71.7 s.u.
PLAT300_ALERT_4_G Atom Site Occupancy of N21        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of C21        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of C22        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of C23        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of C24        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of C25        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of C26        Constrained at        0.3 Check
PLAT300_ALERT_4_G Atom Site Occupancy of C26'       Constrained at        0.2 Check
PLAT300_ALERT_4_G Atom Site Occupancy of H21        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of H22        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of H24        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of H25        Constrained at        0.5 Check
PLAT300_ALERT_4_G Atom Site Occupancy of H26        Constrained at        0.3 Check
PLAT300_ALERT_4_G Atom Site Occupancy of H26'       Constrained at        0.2 Check
PLAT302_ALERT_4_G Anion/Solvent/Minor-Residue Disorder (Resd  2  )       100% Note
PLAT480_ALERT_4_G Long H...A H-Bond Reported H4       ..BR1      .       2.97 Ang.
PLAT480_ALERT_4_G Long H...A H-Bond Reported H5       ..BR1      .       3.12 Ang.
PLAT480_ALERT_4_G Long H...A H-Bond Reported H26      ..BR1      .       2.96 Ang.
PLAT764_ALERT_4_G Overcomplete CIF Bond List Detected (Rep/Expd) .       1.29 Ratio
PLAT779_ALERT_4_G Suspect or Irrelevant (Bond) Angle(s) in CIF ...       5.90 Deg.
              C21  -N21  -C25     1_555   1_555   2_665 ......     #   57 Check
PLAT779_ALERT_4_G Suspect or Irrelevant (Bond) Angle(s) in CIF ...      17.30 Deg.
              C25  -N21  -C21     1_555   1_555   2_665 ......     #   75 Check
PLAT779_ALERT_4_G Suspect or Irrelevant (Bond) Angle(s) in CIF ...      38.30 Deg.
              N21  -C23  -C21     2_665   1_555   2_665 ......     #   84 Check
PLAT779_ALERT_4_G Suspect or Irrelevant (Bond) Angle(s) in CIF ...      31.50 Deg.
              C24  -C23  -C21     1_555   1_555   2_665 ......     #   92 Check
PLAT779_ALERT_4_G Suspect or Irrelevant (Bond) Angle(s) in CIF ...      34.30 Deg.
              C24  -C25  -H21     1_555   1_555   2_665 ......     #  106 Check
PLAT804_ALERT_5_G Number of ARU-Code Packing Problem(s) in PLATON           1 Info
PLAT860_ALERT_3_G Number of Least-Squares Restraints .............         16 Note
PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L=  0.600         79 Note
PLAT978_ALERT_2_G Number C-C Bonds with Positive Residual Density.          4 Info

   0 ALERT level A = Most likely a serious problem - resolve or explain
   0 ALERT level B = A potentially serious problem, consider carefully
  11 ALERT level C = Check. Ensure it is not caused by an omission or oversight
  35 ALERT level G = General information/check it is not something unexpected

   4 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
  11 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
  26 ALERT type 4 Improvement, methodology, query or suggestion
   2 ALERT type 5 Informative message, check

Computing details top

Data collection: CrysAlis PRO 1.171.42.90a (Rigaku OD, 2023); cell refinement: CrysAlis PRO 1.171.42.90a (Rigaku OD, 2023); data reduction: CrysAlis PRO 1.171.42.90a (Rigaku OD, 2023); program(s) used to solve structure: SHELXT2014/5 (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2016/6 (Sheldrick, 2015b); molecular graphics: DIAMOND (Brandenburg & Putz, 1999); software used to prepare material for publication: publCIF (Westrip, 2010).

Poly[[µ-1,2-bis(pyridin-4-yl)ethene-κ²N:N'-µ-bromido-copper(I)] 1,2-bis(pyridin-4-yl)ethene 0.25-solvate] top

Crystal data top

[CuBr(C₁₂H₁₀N₂)]·0.25C₁₂H₁₀N₂	Z = 2
M_r = 370.72	F(000) = 368
Triclinic, P1	D_x = 1.780 Mg m⁻³
a = 7.7421 (2) Å	Cu Kα radiation, λ = 1.54184 Å
b = 10.1612 (2) Å	Cell parameters from 12191 reflections
c = 10.1749 (3) Å	θ = 4.7–77.9°
α = 72.143 (2)°	µ = 5.50 mm⁻¹
β = 73.252 (3)°	T = 100 K
γ = 68.004 (2)°	Block, red
V = 692.68 (4) Å³	0.16 × 0.10 × 0.08 mm

Data collection top

XtaLAB Synergy, Dualflex, HyPix diffractometer	2913 independent reflections
Radiation source: micro-focus sealed X-ray tube, PhotonJet (Cu) X-ray Source	2872 reflections with I > 2σ(I)
Mirror monochromator	R_int = 0.023
Detector resolution: 10.0000 pixels mm^-1	θ_max = 80.1°, θ_min = 4.7°
ω scans	h = −9→9
Absorption correction: multi-scan (CrysalisPro; Rigaku OD, 2023)	k = −12→12
T_min = 0.686, T_max = 1.000	l = −12→10
15373 measured reflections

Refinement top

Refinement on F²	Primary atom site location: dual
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.029	H-atom parameters constrained
wR(F²) = 0.076	w = 1/[σ²(F_o²) + (0.0325P)² + 1.2491P] where P = (F_o² + 2F_c²)/3
S = 1.09	(Δ/σ)_max = 0.001
2913 reflections	Δρ_max = 0.60 e Å⁻³
217 parameters	Δρ_min = −0.62 e Å⁻³
16 restraints

Special details top

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.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq	Occ. (<1)
Cu1	0.10927 (5)	0.86193 (5)	0.40925 (4)	0.03213 (12)
Br1	−0.08547 (4)	0.86001 (3)	0.65801 (3)	0.02641 (9)
N1	−0.0555 (3)	0.8695 (3)	0.2873 (2)	0.0281 (5)
C1	0.0113 (5)	0.8330 (6)	0.1631 (4)	0.0727 (16)
H1	0.143170	0.783182	0.139491	0.087*
C2	−0.1003 (5)	0.8634 (7)	0.0665 (4)	0.0795 (17)
H2	−0.044548	0.834750	−0.020707	0.095*
C3	−0.2928 (4)	0.9353 (3)	0.0968 (3)	0.0311 (6)
C4	−0.3642 (4)	0.9700 (3)	0.2276 (3)	0.0253 (5)
H4	−0.496090	1.017358	0.255058	0.030*
C5	−0.2425 (4)	0.9356 (3)	0.3180 (3)	0.0244 (5)
H5	−0.294996	0.960275	0.407184	0.029*
C6	−0.4080 (4)	0.9702 (3)	−0.0088 (3)	0.0329 (6)
H6	−0.342795	0.947368	−0.097537	0.039*
N11	0.3736 (3)	0.7409 (2)	0.4259 (2)	0.0234 (4)
C11	0.4923 (4)	0.6648 (3)	0.3305 (3)	0.0269 (5)
H11	0.445587	0.666766	0.252948	0.032*
C12	0.6785 (4)	0.5838 (3)	0.3389 (3)	0.0284 (5)
H12	0.755308	0.529594	0.269785	0.034*
C13	0.7539 (3)	0.5816 (3)	0.4487 (3)	0.0242 (5)
C14	0.6307 (4)	0.6606 (3)	0.5484 (3)	0.0261 (5)
H14	0.674801	0.662599	0.625570	0.031*
C15	0.4447 (3)	0.7359 (3)	0.5344 (3)	0.0258 (5)
H15	0.362545	0.786845	0.604744	0.031*
C16	0.9534 (4)	0.4976 (3)	0.4555 (3)	0.0266 (5)
H16	1.020879	0.435330	0.391822	0.032*
N21	0.3823 (9)	0.5175 (8)	−0.0098 (6)	0.0499 (14)	0.5
C21	0.493 (2)	0.4013 (17)	0.062 (3)	0.051 (4)	0.5
H21	0.443905	0.323171	0.111592	0.061*	0.5
C22	0.6762 (13)	0.3836 (8)	0.0708 (7)	0.0514 (19)	0.5
H22	0.748525	0.295564	0.123189	0.062*	0.5
C23	0.7524 (10)	0.4965 (8)	0.0020 (7)	0.0494 (17)	0.5
C24	0.6363 (12)	0.6207 (7)	−0.0705 (7)	0.0495 (18)	0.5
H24	0.680607	0.701567	−0.119425	0.059*	0.5
C25	0.455 (2)	0.6270 (18)	−0.071 (3)	0.044 (3)	0.5
H25	0.377125	0.715220	−0.119266	0.052*	0.5
C26	0.9471 (15)	0.4575 (12)	0.0265 (10)	0.0280 (18)	0.3
H26	0.997754	0.365000	0.084446	0.034*	0.3
C26'	0.930 (3)	0.546 (2)	−0.0285 (15)	0.038 (4)	0.2
H26'	0.934250	0.638394	−0.085763	0.045*	0.2

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cu1	0.0218 (2)	0.0507 (3)	0.0213 (2)	−0.00529 (17)	−0.00852 (15)	−0.00798 (17)
Br1	0.02694 (14)	0.02953 (15)	0.01730 (14)	−0.00214 (10)	−0.00306 (10)	−0.00738 (10)
N1	0.0224 (10)	0.0430 (13)	0.0183 (11)	−0.0073 (9)	−0.0066 (8)	−0.0076 (9)
C1	0.0211 (14)	0.156 (5)	0.0325 (19)	0.005 (2)	−0.0076 (13)	−0.049 (2)
C2	0.0277 (16)	0.170 (5)	0.0333 (19)	0.006 (2)	−0.0089 (14)	−0.055 (3)
C3	0.0258 (13)	0.0462 (16)	0.0215 (13)	−0.0083 (11)	−0.0067 (10)	−0.0096 (11)
C4	0.0238 (12)	0.0261 (12)	0.0248 (13)	−0.0044 (9)	−0.0073 (9)	−0.0062 (10)
C5	0.0269 (12)	0.0240 (11)	0.0227 (12)	−0.0050 (9)	−0.0071 (9)	−0.0075 (9)
C6	0.0273 (13)	0.0525 (17)	0.0200 (13)	−0.0077 (11)	−0.0053 (10)	−0.0153 (12)
N11	0.0221 (10)	0.0265 (10)	0.0212 (10)	−0.0063 (8)	−0.0053 (8)	−0.0057 (8)
C11	0.0295 (13)	0.0280 (12)	0.0238 (13)	−0.0040 (10)	−0.0093 (10)	−0.0090 (10)
C12	0.0298 (13)	0.0290 (13)	0.0244 (13)	−0.0044 (10)	−0.0035 (10)	−0.0110 (10)
C13	0.0233 (12)	0.0207 (11)	0.0269 (13)	−0.0048 (9)	−0.0047 (9)	−0.0056 (9)
C14	0.0241 (12)	0.0304 (12)	0.0257 (13)	−0.0061 (10)	−0.0079 (10)	−0.0092 (10)
C15	0.0223 (11)	0.0308 (13)	0.0243 (13)	−0.0049 (10)	−0.0041 (9)	−0.0109 (10)
C16	0.0245 (12)	0.0240 (12)	0.0295 (14)	−0.0038 (9)	−0.0031 (10)	−0.0102 (10)
N21	0.048 (3)	0.067 (5)	0.037 (3)	−0.017 (3)	−0.002 (3)	−0.020 (3)
C21	0.068 (10)	0.035 (7)	0.035 (8)	−0.011 (8)	0.011 (7)	−0.014 (6)
C22	0.065 (5)	0.049 (4)	0.024 (3)	0.006 (4)	−0.009 (3)	−0.015 (3)
C23	0.046 (4)	0.073 (5)	0.035 (4)	−0.012 (3)	0.005 (3)	−0.039 (4)
C24	0.071 (5)	0.046 (4)	0.031 (3)	−0.032 (4)	0.016 (3)	−0.016 (3)
C25	0.054 (8)	0.032 (6)	0.025 (4)	0.000 (6)	−0.003 (6)	−0.001 (5)
C26	0.036 (6)	0.026 (6)	0.014 (4)	−0.003 (4)	−0.003 (4)	−0.003 (4)
C26'	0.061 (13)	0.030 (9)	0.008 (6)	−0.009 (8)	−0.006 (7)	0.007 (6)

Geometric parameters (Å, º) top

Cu1—Br1	2.5441 (5)	C14—C15	1.381 (3)
Cu1—Br1ⁱ	2.6424 (5)	C15—H15	0.9500
Cu1—N1	1.988 (2)	C16—C16ⁱⁱⁱ	1.331 (5)
Cu1—N11	1.979 (2)	C16—H16	0.9500
N1—C1	1.330 (4)	N21—N21^iv	1.781 (13)
N1—C5	1.336 (3)	N21—C21	1.319 (13)
C1—H1	0.9500	N21—C21^iv	1.386 (18)
C1—C2	1.382 (4)	N21—C22^iv	1.019 (9)
C2—H2	0.9500	N21—C23^iv	1.081 (9)
C2—C3	1.381 (4)	N21—C24^iv	1.428 (10)
C3—C4	1.385 (4)	N21—C25^iv	1.701 (16)
C3—C6	1.468 (4)	N21—C25	1.337 (15)
C4—H4	0.9500	C21—H21	0.9500
C4—C5	1.382 (3)	C21—C22	1.385 (13)
C5—H5	0.9500	C22—H22	0.9500
C6—C6ⁱⁱ	1.305 (5)	C22—C23	1.389 (11)
C6—H6	0.9500	C23—C24	1.381 (10)
N11—C11	1.341 (3)	C23—C26	1.484 (12)
N11—C15	1.349 (3)	C23—C26'	1.55 (2)
C11—H11	0.9500	C24—H24	0.9500
C11—C12	1.379 (4)	C24—C25	1.382 (14)
C12—H12	0.9500	C25—H25	0.9500
C12—C13	1.393 (4)	C26—C26^v	1.30 (2)
C13—C14	1.397 (3)	C26—H26	0.9500
C13—C16	1.469 (3)	C26'—C26'^v	1.29 (3)
C14—H14	0.9500	C26'—H26'	0.9500

Br1—Cu1—Br1ⁱ	96.351 (16)	C22^iv—N21—N21^iv	115.6 (9)
N1—Cu1—Br1ⁱ	99.06 (7)	C22^iv—N21—C21	166.0 (9)
N1—Cu1—Br1	108.16 (6)	C22^iv—N21—C21^iv	68.3 (8)
N11—Cu1—Br1ⁱ	109.28 (6)	C22^iv—N21—C23^iv	82.7 (8)
N11—Cu1—Br1	107.21 (6)	C22^iv—N21—C24^iv	147.8 (9)
N11—Cu1—N1	131.18 (9)	C22^iv—N21—C25^iv	160.5 (10)
Cu1—Br1—Cu1ⁱ	83.649 (16)	C22^iv—N21—C25	51.4 (8)
C1—N1—Cu1	123.56 (19)	C23^iv—N21—N21^iv	161.7 (9)
C1—N1—C5	116.2 (2)	C23^iv—N21—C21	111.2 (9)
C5—N1—Cu1	119.41 (17)	C23^iv—N21—C21^iv	151.1 (10)
N1—C1—H1	118.1	C23^iv—N21—C24^iv	65.1 (6)
N1—C1—C2	123.7 (3)	C23^iv—N21—C25^iv	116.6 (9)
C2—C1—H1	118.1	C23^iv—N21—C25	134.0 (10)
C1—C2—H2	120.0	C24^iv—N21—N21^iv	96.6 (6)
C3—C2—C1	120.0 (3)	C24^iv—N21—C25^iv	51.5 (6)
C3—C2—H2	120.0	C25—N21—N21^iv	64.3 (7)
C2—C3—C4	116.5 (2)	C25^iv—N21—N21^iv	45.1 (6)
C2—C3—C6	119.2 (3)	C25—N21—C21^iv	17.3 (9)
C4—C3—C6	124.3 (2)	C25—N21—C24^iv	160.9 (9)
C3—C4—H4	120.2	C25—N21—C25^iv	109.4 (8)
C5—C4—C3	119.7 (2)	N21—C21—H21	117.3
C5—C4—H4	120.2	N21—C21—C22	125.5 (12)
N1—C5—C4	123.8 (2)	C22—C21—H21	117.3
N1—C5—H5	118.1	C21—C22—H22	120.5
C4—C5—H5	118.1	C21—C22—C23	119.1 (10)
C3—C6—H6	117.2	C23—C22—H22	120.5
C6ⁱⁱ—C6—C3	125.7 (3)	N21^iv—C23—C21^iv	38.3 (6)
C6ⁱⁱ—C6—H6	117.2	N21^iv—C23—C22	46.7 (6)
C11—N11—Cu1	123.12 (17)	N21^iv—C23—C24	69.7 (7)
C11—N11—C15	116.7 (2)	N21^iv—C23—C26	157.5 (9)
C15—N11—Cu1	120.17 (17)	N21^iv—C23—C26'	168.7 (10)
N11—C11—H11	118.2	C22—C23—C21^iv	85.0 (6)
N11—C11—C12	123.5 (2)	C22—C23—C26	110.8 (8)
C12—C11—H11	118.2	C22—C23—C26'	144.6 (9)
C11—C12—H12	120.0	C24—C23—C21^iv	31.5 (6)
C11—C12—C13	120.0 (2)	C24—C23—C22	116.4 (7)
C13—C12—H12	120.0	C24—C23—C26	132.8 (8)
C12—C13—C14	116.7 (2)	C24—C23—C26'	99.0 (9)
C12—C13—C16	119.7 (2)	C26—C23—C21^iv	164.2 (8)
C14—C13—C16	123.6 (2)	C23—C24—H21^iv	164.4 (16)
C13—C14—H14	120.1	C23—C24—H24	120.1
C15—C14—C13	119.8 (2)	C23—C24—C25	119.7 (8)
C15—C14—H14	120.1	H24—C24—H21^iv	74.4
N11—C15—C14	123.3 (2)	C25—C24—H21^iv	46.1 (18)
N11—C15—H15	118.3	C25—C24—H24	120.1
C14—C15—H15	118.3	N21—C25—H21^iv	158 (2)
C13—C16—H16	117.6	N21—C25—C24	124.6 (12)
C16ⁱⁱⁱ—C16—C13	124.8 (3)	N21—C25—H25	117.7
C16ⁱⁱⁱ—C16—H16	117.6	C24—C25—H21^iv	34.3 (10)
C21—N21—N21^iv	50.5 (8)	C24—C25—H25	117.7
C21^iv—N21—N21^iv	47.2 (6)	H25—C25—H21^iv	83.9
C21—N21—C21^iv	97.7 (9)	C23—C26—H26	118.0
C21^iv—N21—C24^iv	143.8 (8)	C26^v—C26—C23	124.0 (14)
C21—N21—C24^iv	46.2 (8)	C26^v—C26—H26	118.0
C21—N21—C25	114.7 (10)	C23—C26'—H26'	121.9
C21^iv—N21—C25^iv	92.3 (8)	C26'^v—C26'—C23	116 (2)
C21—N21—C25^iv	5.9 (13)	C26'^v—C26'—H26'	121.9

Symmetry codes: (i) −x, −y+2, −z+1; (ii) −x−1, −y+2, −z; (iii) −x+2, −y+1, −z+1; (iv) −x+1, −y+1, −z; (v) −x+2, −y+1, −z.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C4—H4···Br1^vi	0.95	2.97	3.919 (3)	175
C5—H5···Br1	0.95	3.12	3.759 (2)	126
C24—H24···Br1^vii	0.95	2.93	3.816 (7)	156
C26—H26···Br1^viii	0.95	2.96	3.861 (12)	159
C26′—H26′···Br1^vii	0.95	2.87	3.751 (17)	154

Symmetry codes: (vi) −x−1, −y+2, −z+1; (vii) x+1, y, z−1; (viii) −x+1, −y+1, −z+1.

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Synthesis, crystal structure and thermal properties of poly[[μ-1,2-bis­(pyridin-4-yl)ethene-κ2N:N′-μ-bromido-copper(I)] 1,2-bis­(pyridin-4-yl)ethene 0.25-solvate]

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Synthesis, crystal structure and thermal properties of poly[[μ-1,2-bis(pyridin-4-yl)ethene-κ²N:N′-μ-bromido-copper(I)] 1,2-bis(pyridin-4-yl)ethene 0.25-solvate]