Poly[(μ3-nicotinato-κ3O:O′:N)(μ2-nicotinato-κ3O,O′:N)iron(II)]

Ng, S.W.

doi:10.1107/S1600536808011045

metal-organic compounds

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Volume 64| Part 5| May 2008| Page m728

doi:10.1107/S1600536808011045

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Poly[(μ₃-nicotinato-κ³O:O′:N)(μ₂-nicotinato-κ³O,O′:N)iron(II)]

Seik Weng Ng ^a ^*

^aDepartment of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
^*Correspondence e-mail: seikweng@um.edu.my

(Received 19 March 2008; accepted 20 April 2008; online 26 April 2008)

In the crystal structure of the title compound, [Fe(C₆H₄NO₂)₂]_n, one nicotinate group O,O′-chelates one Fe atom and binds through the N atom to the other Fe atom; the second nicotinate group bridges three Fe atoms through the N and two O atoms. The μ₂- and μ₃-bridging modes of the two nicotinate groups result in a polymeric three-dimensional network structure. The Fe atom shows octahedral coordination geometry but one of the Fe—O bonds is somewhat long [2.522 (2) Å].

Related literature

For zwitterionic tetraaquadi(nicotinato-κN)iron(II), see: Liang et al. (2005 ).

Experimental

Crystal data

[Fe(C₆H₄NO₂)₂]
M_r = 300.05
Monoclinic, P 2₁ /n
a = 10.8771 (7) Å
b = 9.6066 (6) Å
c = 12.7284 (8) Å
β = 111.619 (1)°
V = 1236.5 (1) Å³
Z = 4
Mo Kα radiation
μ = 1.23 mm⁻¹
T = 295 (2) K
0.41 × 0.34 × 0.25 mm

Data collection

Bruker SMART APEX diffractometer
Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ) T_min = 0.564, T_max = 0.749
7255 measured reflections
2762 independent reflections
2428 reflections with I > 2σ(I)
R_int = 0.018

Refinement

R[F² > 2σ(F²)] = 0.028
wR(F²) = 0.078
S = 1.02
2762 reflections
172 parameters
H-atom parameters constrained
Δρ_max = 0.24 e Å⁻³
Δρ_min = −0.27 e Å⁻³

Table 1
Selected geometric parameters (Å, °)

Fe1—O1	2.522 (2)
Fe1—O2	2.072 (1)
Fe1—O3	2.012 (1)
Fe1—O4ⁱ	2.061 (1)
Fe1—N1ⁱⁱ	2.212 (1)
Fe1—N2ⁱⁱⁱ	2.224 (1)

O1—Fe1—O2	56.18 (5)
O1—Fe1—O3	96.95 (5)
O1—Fe1—O4ⁱ	142.30 (5)
O1—Fe1—N1ⁱⁱ	89.36 (5)
O1—Fe1—N2ⁱⁱⁱ	93.18 (5)
O2—Fe1—O3	153.10 (6)
O2—Fe1—O4ⁱ	86.23 (5)
O2—Fe1—N1ⁱⁱ	92.17 (5)
O2—Fe1—N2ⁱⁱⁱ	90.93 (5)
O3—Fe1—O4ⁱ	120.67 (6)
O3—Fe1—N1ⁱⁱ	88.50 (5)
O3—Fe1—N2ⁱⁱⁱ	89.17 (5)
O4ⁱ—Fe1—N1ⁱⁱ	89.39 (6)
O4ⁱ—Fe1—N2ⁱⁱⁱ	89.83 (6)
N1ⁱⁱ—Fe1—N2ⁱⁱⁱ	176.74 (5)
Symmetry codes: (i) -x+1, -y+1, -z+1; (ii) $[-x+{\script{1\over 2}}, y+{\script{1\over 2}}, -z+{\script{3\over 2}}]$ ; (iii) $[x+{\script{1\over 2}}, -y+{\script{1\over 2}}, z+{\script{1\over 2}}]$ .

Data collection: SMART (Bruker, 2004 ); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001 ) and OLEX (Dolomanov et al., 2003 ); software used to prepare material for publication: publCIF (Westrip, 2008 ).

Supporting information

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536808011045/xu2410sup1.cif

Structure factors: contains datablock I. DOI: 10.1107/S1600536808011045/xu2410Isup2.hkl

checkCIF report

Comment top

The crystal structures of a large number of divalent metal dinicotinates are known; the compounds exists as water-coordinated compounds in which the nicotinate ion binds through the aromatic N atom and not through the carboxyl group, as exemplified by tetraaquadinicotinatoiron(II). The report on this compound lists the crystal structures of tetraaquametal dinicotinates (Liang et al., 2005). Tetraaquadinicotinatoiron is synthesized by reaction of the metal salt with nicotinic acid under aqueous conditions; under hydrothermal conditions, the synthesis has yielded the anhydrous compound (I). Iron dinicotinate (Fig. 1) has the nicotinate group engaged into two types of bridging interactions; one group O,O'-chelate to one Fe atom and binds through the N atom to the other Fe atom; the second nicotinate group bridges three Fe atoms through the N and two O atoms. The µ₂ and µ₃ bridging modes of the two nicotinate groups result in a polymeric three-dimensional network structure (Fig. 2). The Fe atom shows the common octahedral coordination geometry but one of the Fe–O bonds is somewhat long (Table 1).

Related literature top

For zwitterionc tetraaquadi(nicotinato-κN)iron(II), see: Liang et al. (2005).

Experimental top

Iron powder (0.056 g, 1 mmol), nicotinic acid (0.218 g 2 mmol) and water (10 ml) heated in a 23-ml, Teflon-lined, Parr bomb at 423 K for 3 days. The bomb was cooled to room temperature at a rate of 10 K per min to give yellow block-shaped crystals (in 10% yield based on nicotinic acid rate of 10 ^oC.h-1. The yellow block crystals of iron dinicoinate were obtained (yield 8.2% based on nicotinic acid).

Computing details top

Data collection: SMART (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: X-SEED (Barbour, 2001) and OLEX (Dolomanov et al., 2003); software used to prepare material for publication: publCIF (Westrip, 2008).

Figures top

	Fig. 1. 50% Probability thermal ellipsoid plot illustrating the octahedral geometry at iron.
	Fig. 2. OLEX (Dolomanov et al., 2003) illustration of the three-dimensional network motif.

Poly[(µ₃-nicotinato-κ³O:O':N)(µ₂-nicotinato- κ³O,O':N)iron(II)] top

Crystal data top

[Fe(C₆H₄NO₂)₂]	F(000) = 608
M_r = 300.05	D_x = 1.612 Mg m⁻³
Monoclinic, P2₁/n	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2yn	Cell parameters from 6064 reflections
a = 10.8771 (7) Å	θ = 2.1–27.5°
b = 9.6066 (6) Å	µ = 1.23 mm⁻¹
c = 12.7284 (8) Å	T = 295 K
β = 111.619 (1)°	Block, yellow
V = 1236.5 (1) Å³	0.41 × 0.34 × 0.25 mm
Z = 4

Data collection top

Bruker APEX diffractometer	2762 independent reflections
Radiation source: fine-focus sealed tube	2428 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.018
ϕ and ω scans	θ_max = 27.5°, θ_min = 2.1°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −14→14
T_min = 0.564, T_max = 0.749	k = −10→12
7255 measured reflections	l = −13→16

Refinement top

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)] = 0.028	Hydrogen site location: inferred from neighbouring sites
wR(F²) = 0.078	H-atom parameters constrained
S = 1.02	w = 1/[σ²(F_o²) + (0.0475P)² + 0.2265P] where P = (F_o² + 2F_c²)/3
2762 reflections	(Δ/σ)_max = 0.001
172 parameters	Δρ_max = 0.24 e Å⁻³
0 restraints	Δρ_min = −0.27 e Å⁻³

Crystal data top

[Fe(C₆H₄NO₂)₂]	V = 1236.5 (1) Å³
M_r = 300.05	Z = 4
Monoclinic, P2₁/n	Mo Kα radiation
a = 10.8771 (7) Å	µ = 1.23 mm⁻¹
b = 9.6066 (6) Å	T = 295 K
c = 12.7284 (8) Å	0.41 × 0.34 × 0.25 mm
β = 111.619 (1)°

Data collection top

Bruker APEX diffractometer	2762 independent reflections
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	2428 reflections with I > 2σ(I)
T_min = 0.564, T_max = 0.749	R_int = 0.018
7255 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.028	0 restraints
wR(F²) = 0.078	H-atom parameters constrained
S = 1.02	Δρ_max = 0.24 e Å⁻³
2762 reflections	Δρ_min = −0.27 e Å⁻³
172 parameters

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

	x	y	z	U_iso*/U_eq
Fe1	0.40603 (2)	0.37707 (2)	0.580119 (18)	0.02707 (10)
O1	0.28044 (15)	0.19952 (16)	0.64714 (12)	0.0540 (4)
O2	0.43525 (13)	0.34442 (14)	0.74858 (11)	0.0398 (3)
O3	0.32118 (11)	0.33429 (14)	0.41409 (10)	0.0345 (3)
O4	0.45693 (13)	0.46511 (14)	0.36328 (12)	0.0477 (3)
N1	0.25364 (13)	0.02956 (15)	0.94060 (12)	0.0335 (3)
N2	0.06748 (13)	0.27149 (15)	0.09200 (12)	0.0335 (3)
C1	0.35420 (18)	0.24585 (18)	0.73955 (15)	0.0371 (4)
C2	0.35386 (17)	0.18565 (18)	0.84835 (14)	0.0336 (4)
C3	0.25803 (17)	0.09027 (18)	0.84724 (15)	0.0344 (4)
H3	0.1932	0.0671	0.7780	0.041*
C4	0.34759 (18)	0.0657 (2)	1.03903 (15)	0.0396 (4)
H4	0.3462	0.0246	1.1047	0.048*
C5	0.4460 (2)	0.1601 (2)	1.04838 (16)	0.0450 (5)
H5	0.5090	0.1824	1.1187	0.054*
C6	0.44980 (18)	0.2211 (2)	0.95150 (16)	0.0415 (4)
H6	0.5156	0.2849	0.9554	0.050*
C7	0.35595 (15)	0.39427 (16)	0.34127 (14)	0.0283 (3)
C8	0.26579 (15)	0.37708 (15)	0.22048 (14)	0.0281 (3)
C9	0.15745 (16)	0.29047 (17)	0.19585 (13)	0.0314 (3)
H9	0.1464	0.2424	0.2552	0.038*
C10	0.08654 (19)	0.3417 (2)	0.00799 (15)	0.0400 (4)
H10	0.0251	0.3306	−0.0651	0.048*
C11	0.19213 (19)	0.4291 (2)	0.02432 (15)	0.0432 (4)
H11	0.2013	0.4753	−0.0366	0.052*
C12	0.28458 (18)	0.44749 (18)	0.13239 (15)	0.0368 (4)
H12	0.3572	0.5054	0.1456	0.044*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Fe1	0.02436 (14)	0.03310 (15)	0.01968 (14)	−0.00138 (8)	0.00333 (10)	−0.00096 (8)
O1	0.0695 (10)	0.0593 (9)	0.0300 (7)	−0.0046 (8)	0.0145 (7)	0.0019 (6)
O2	0.0405 (7)	0.0448 (7)	0.0379 (7)	0.0017 (6)	0.0188 (6)	0.0113 (5)
O3	0.0304 (6)	0.0479 (7)	0.0207 (6)	−0.0014 (5)	0.0042 (5)	−0.0011 (5)
O4	0.0393 (7)	0.0507 (8)	0.0417 (8)	−0.0193 (6)	0.0014 (6)	−0.0023 (6)
N1	0.0301 (7)	0.0397 (8)	0.0282 (7)	−0.0009 (6)	0.0080 (6)	0.0040 (6)
N2	0.0311 (7)	0.0408 (8)	0.0225 (7)	−0.0059 (6)	0.0027 (6)	0.0003 (6)
C1	0.0419 (9)	0.0396 (9)	0.0332 (9)	0.0092 (8)	0.0176 (8)	0.0055 (7)
C2	0.0358 (9)	0.0359 (9)	0.0311 (9)	0.0018 (7)	0.0146 (7)	0.0027 (7)
C3	0.0331 (8)	0.0396 (9)	0.0267 (8)	0.0007 (7)	0.0065 (7)	0.0021 (7)
C4	0.0389 (9)	0.0504 (11)	0.0267 (9)	−0.0055 (8)	0.0089 (7)	0.0053 (8)
C5	0.0426 (10)	0.0566 (12)	0.0285 (9)	−0.0122 (9)	0.0045 (8)	0.0005 (8)
C6	0.0403 (9)	0.0462 (10)	0.0368 (10)	−0.0110 (8)	0.0127 (8)	0.0018 (8)
C7	0.0255 (8)	0.0286 (8)	0.0262 (8)	0.0026 (6)	0.0044 (6)	−0.0032 (6)
C8	0.0270 (8)	0.0311 (8)	0.0240 (8)	−0.0006 (6)	0.0066 (6)	−0.0023 (6)
C9	0.0305 (8)	0.0383 (9)	0.0224 (8)	−0.0044 (7)	0.0061 (6)	0.0015 (6)
C10	0.0433 (10)	0.0458 (10)	0.0222 (8)	−0.0046 (8)	0.0017 (7)	0.0014 (7)
C11	0.0519 (11)	0.0481 (10)	0.0274 (9)	−0.0099 (9)	0.0121 (8)	0.0059 (8)
C12	0.0378 (9)	0.0398 (9)	0.0313 (9)	−0.0093 (7)	0.0109 (7)	0.0003 (7)

Geometric parameters (Å, º) top

Fe1—O1	2.522 (2)	C2—C3	1.384 (2)
Fe1—O2	2.072 (1)	C2—C6	1.385 (3)
Fe1—O3	2.012 (1)	C3—H3	0.9300
Fe1—O4ⁱ	2.061 (1)	C4—C5	1.375 (3)
Fe1—N1ⁱⁱ	2.212 (1)	C4—H4	0.9300
Fe1—N2ⁱⁱⁱ	2.224 (1)	C5—C6	1.379 (3)
O1—C1	1.237 (2)	C5—H5	0.9300
O2—C1	1.270 (2)	C6—H6	0.9300
O3—C7	1.262 (2)	C7—C8	1.497 (2)
O4—C7	1.233 (2)	C8—C9	1.381 (2)
O4—Fe1ⁱ	2.0611 (12)	C8—C12	1.388 (2)
N1—C4	1.338 (2)	C9—H9	0.9300
N1—C3	1.340 (2)	C10—C11	1.375 (3)
N1—Fe1^iv	2.2124 (14)	C10—H10	0.9300
N2—C9	1.336 (2)	C11—C12	1.384 (2)
N2—C10	1.343 (2)	C11—H11	0.9300
N2—Fe1^v	2.2243 (14)	C12—H12	0.9300
C1—C2	1.502 (2)

O1—Fe1—O2	56.18 (5)	N1—C3—C2	123.49 (16)
O1—Fe1—O3	96.95 (5)	N1—C3—H3	118.3
O1—Fe1—O4ⁱ	142.30 (5)	C2—C3—H3	118.3
O1—Fe1—N1ⁱⁱ	89.36 (5)	N1—C4—C5	123.64 (17)
O1—Fe1—N2ⁱⁱⁱ	93.18 (5)	N1—C4—H4	118.2
O2—Fe1—O3	153.10 (6)	C5—C4—H4	118.2
O2—Fe1—O4ⁱ	86.23 (5)	C4—C5—C6	118.78 (18)
O2—Fe1—N1ⁱⁱ	92.17 (5)	C4—C5—H5	120.6
O2—Fe1—N2ⁱⁱⁱ	90.93 (5)	C6—C5—H5	120.6
O3—Fe1—O4ⁱ	120.67 (6)	C5—C6—C2	118.87 (17)
O3—Fe1—N1ⁱⁱ	88.50 (5)	C5—C6—H6	120.6
O3—Fe1—N2ⁱⁱⁱ	89.17 (5)	C2—C6—H6	120.6
O4ⁱ—Fe1—N1ⁱⁱ	89.39 (6)	O4—C7—O3	124.60 (16)
O4ⁱ—Fe1—N2ⁱⁱⁱ	89.83 (6)	O4—C7—C8	119.06 (15)
N1ⁱⁱ—Fe1—N2ⁱⁱⁱ	176.74 (5)	O3—C7—C8	116.33 (14)
C1—O1—Fe1	80.56 (11)	C9—C8—C12	118.53 (15)
C1—O2—Fe1	100.52 (11)	C9—C8—C7	118.75 (15)
C7—O3—Fe1	122.17 (11)	C12—C8—C7	122.70 (15)
C7—O4—Fe1ⁱ	162.57 (13)	N2—C9—C8	124.03 (15)
C4—N1—C3	116.93 (15)	N2—C9—H9	118.0
C4—N1—Fe1^iv	125.34 (12)	C8—C9—H9	118.0
C3—N1—Fe1^iv	117.73 (11)	N2—C10—C11	123.46 (16)
C9—N2—C10	116.58 (14)	N2—C10—H10	118.3
C9—N2—Fe1^v	115.27 (11)	C11—C10—H10	118.3
C10—N2—Fe1^v	128.13 (12)	C10—C11—C12	119.27 (17)
O1—C1—O2	122.67 (17)	C10—C11—H11	120.4
O1—C1—C2	121.14 (17)	C12—C11—H11	120.4
O2—C1—C2	116.18 (16)	C11—C12—C8	118.12 (16)
C3—C2—C6	118.28 (16)	C11—C12—H12	120.9
C3—C2—C1	120.21 (16)	C8—C12—H12	120.9
C6—C2—C1	121.49 (16)

O3—Fe1—O1—C1	177.00 (11)	C1—C2—C3—N1	178.18 (15)
O4ⁱ—Fe1—O1—C1	−6.40 (16)	C3—N1—C4—C5	0.0 (3)
O2—Fe1—O1—C1	−1.54 (10)	Fe1^iv—N1—C4—C5	179.39 (16)
N1ⁱⁱ—Fe1—O1—C1	−94.59 (11)	N1—C4—C5—C6	−0.4 (3)
N2ⁱⁱⁱ—Fe1—O1—C1	87.45 (11)	C4—C5—C6—C2	0.4 (3)
O3—Fe1—O2—C1	−1.69 (18)	C3—C2—C6—C5	0.1 (3)
O4ⁱ—Fe1—O2—C1	178.53 (11)	C1—C2—C6—C5	−178.59 (17)
N1ⁱⁱ—Fe1—O2—C1	89.28 (11)	Fe1ⁱ—O4—C7—O3	−68.9 (5)
N2ⁱⁱⁱ—Fe1—O2—C1	−91.70 (11)	Fe1ⁱ—O4—C7—C8	110.7 (4)
O1—Fe1—O2—C1	1.51 (10)	Fe1—O3—C7—O4	12.9 (2)
O4ⁱ—Fe1—O3—C7	5.56 (14)	Fe1—O3—C7—C8	−166.66 (10)
O2—Fe1—O3—C7	−174.18 (11)	O4—C7—C8—C9	175.90 (15)
N1ⁱⁱ—Fe1—O3—C7	93.97 (13)	O3—C7—C8—C9	−4.5 (2)
N2ⁱⁱⁱ—Fe1—O3—C7	−83.75 (13)	O4—C7—C8—C12	−5.9 (2)
O1—Fe1—O3—C7	−176.85 (12)	O3—C7—C8—C12	173.73 (15)
Fe1—O1—C1—O2	2.49 (16)	C10—N2—C9—C8	0.4 (3)
Fe1—O1—C1—C2	−176.46 (16)	Fe1^v—N2—C9—C8	179.22 (13)
Fe1—O2—C1—O1	−3.0 (2)	C12—C8—C9—N2	−1.1 (3)
Fe1—O2—C1—C2	175.95 (12)	C7—C8—C9—N2	177.20 (15)
O1—C1—C2—C3	−9.1 (3)	C9—N2—C10—C11	0.3 (3)
O2—C1—C2—C3	171.91 (16)	Fe1^v—N2—C10—C11	−178.38 (15)
O1—C1—C2—C6	169.55 (18)	N2—C10—C11—C12	−0.2 (3)
O2—C1—C2—C6	−9.5 (2)	C10—C11—C12—C8	−0.5 (3)
C4—N1—C3—C2	0.4 (3)	C9—C8—C12—C11	1.1 (3)
Fe1^iv—N1—C3—C2	−178.97 (13)	C7—C8—C12—C11	−177.12 (16)
C6—C2—C3—N1	−0.5 (3)

Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+1/2, y+1/2, −z+3/2; (iii) x+1/2, −y+1/2, z+1/2; (iv) −x+1/2, y−1/2, −z+3/2; (v) x−1/2, −y+1/2, z−1/2.

Experimental details

Crystal data
Chemical formula	[Fe(C₆H₄NO₂)₂]
M_r	300.05
Crystal system, space group	Monoclinic, P2₁/n
Temperature (K)	295
a, b, c (Å)	10.8771 (7), 9.6066 (6), 12.7284 (8)
β (°)	111.619 (1)
V (Å³)	1236.5 (1)
Z	4
Radiation type	Mo Kα
µ (mm⁻¹)	1.23
Crystal size (mm)	0.41 × 0.34 × 0.25

Data collection
Diffractometer	Bruker APEX diffractometer
Absorption correction	Multi-scan (SADABS; Sheldrick, 1996)
T_min, T_max	0.564, 0.749
No. of measured, independent and observed [I > 2σ(I)] reflections	7255, 2762, 2428
R_int	0.018
(sin θ/λ)_max (Å⁻¹)	0.650

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.028, 0.078, 1.02
No. of reflections	2762
No. of parameters	172
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.24, −0.27

Computer programs: SMART (Bruker, 2004), SAINT (Bruker, 2004), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), X-SEED (Barbour, 2001) and OLEX (Dolomanov et al., 2003), publCIF (Westrip, 2008).

Selected geometric parameters (Å, º) top

Fe1—O1	2.522 (2)	Fe1—O4ⁱ	2.061 (1)
Fe1—O2	2.072 (1)	Fe1—N1ⁱⁱ	2.212 (1)
Fe1—O3	2.012 (1)	Fe1—N2ⁱⁱⁱ	2.224 (1)

O1—Fe1—O2	56.18 (5)	O2—Fe1—N2ⁱⁱⁱ	90.93 (5)
O1—Fe1—O3	96.95 (5)	O3—Fe1—O4ⁱ	120.67 (6)
O1—Fe1—O4ⁱ	142.30 (5)	O3—Fe1—N1ⁱⁱ	88.50 (5)
O1—Fe1—N1ⁱⁱ	89.36 (5)	O3—Fe1—N2ⁱⁱⁱ	89.17 (5)
O1—Fe1—N2ⁱⁱⁱ	93.18 (5)	O4ⁱ—Fe1—N1ⁱⁱ	89.39 (6)
O2—Fe1—O3	153.10 (6)	O4ⁱ—Fe1—N2ⁱⁱⁱ	89.83 (6)
O2—Fe1—O4ⁱ	86.23 (5)	N1ⁱⁱ—Fe1—N2ⁱⁱⁱ	176.74 (5)
O2—Fe1—N1ⁱⁱ	92.17 (5)

Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) −x+1/2, y+1/2, −z+3/2; (iii) x+1/2, −y+1/2, z+1/2.

Acknowledgements

I thank Mr Yan-Zhen Zheng of Sun Yat-Sen University for synthesizing the compound and measuring the crystal and the University of Malaya for supporting this study.

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