metal-organic compounds

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1 metal-organic compounds Acta Crystallographica Section E Structure Reports Online ISSN Tris(propane-1,2-diamine-j 2 N,N 0 )- nickel(ii) tetracyanidonickelate(ii) Juraj Kuchár and Juraj Černák* Department of Inorganic Chemistry, Institute of Chemistry, P. J. Šafárik University, Moyzesova 11, Košice, Slovakia Correspondence juraj.kuchar@upjs.sk Refinement R[F 2 >2(F 2 )] = wr(f 2 ) = S = reflections 183 parameters Table 1 Selected bond lengths (Å). Ni1 C (7) Ni1 C (4) Ni1 C (7) Ni2 N (6) Ni2 N (6) 12 restraints H-atom parameters constrained max = 0.52 e Å 3 min = 0.60 e Å 3 Ni2 N (6) Ni2 N (6) Ni2 N (6) Ni2 N (5) Received 20 November 2007; accepted 25 December 2007 Key indicators: single-crystal X-ray study; T = 193 K; mean (C C) = Å; disorder in main residue; R factor = 0.037; wr factor = 0.101; data-to-parameter ratio = Table 2 Hydrogen-bond geometry (Å, ). The title compound, [Ni(C 3 H 10 N 2 ) 3 ][Ni(CN) 4 ], is built up of [Ni(pn) 3 ] 2+ cations (pn is 1,2-diaminopropane) and [Ni(CN) 4 ] 2 anions. Both Ni II atoms in the cation and the anion lie on a mirror plane. The respective ions interact through Coulombic forces and through a complex network of hydrogen bonds. Extended disorder associated with the cation has been resolved. The occupancies of the respective disordered positions are 0.4:0.4:0.2. Related literature For related literature, see: Paharová et al. (2007); Rodriguez et al. (1999); Saha et al. (2005); Smékal et al. (2001); Černák et al. (2002); Bubanec et al. (2004); Potočňák et al. (2008). D HA D H HA DA D HA N4 H4AN2 i (7) 167 N5 H5AN2 ii (6) 169 N5 H5BN (8) 159 N6 H6AN2 i (7) 152 N6 H6BN (7) 147 N7 H7AN1 iii (8) 158 N7 H7BN1 iv (7) 145 N8 H8AN1 iii (8) 179 N9 H9AN2 ii (8) 144 Symmetry codes: (i) x þ 1; y; z; (ii) x þ 1; y þ 1 2 ; z; (iii) x 1 2 ; y; z þ 1 2 ; (iv) x 1; y; z. Data collection: EXPOSE in IPDS (Stoe & Cie, 1999); cell refinement: CELL in IPDS; data reduction: INTEGRATE in IPDS; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: PARST (Nardelli, 1983) and SHELXL97 (Sheldrick, 1997); molecular graphics: DIAMOND (Brandenburg, 2004); software used to prepare material for publication: SHELXL97 (Sheldrick, 1997). This work was supported by the Slovak Grant Agency VEGA (grant No. 1/3550/06) and by the APVV (grant No ). The authors thank Professor Werner Massa (Phillips Universität, Marburg) for kind permission to use the diffractometer. Experimental Crystal data [Ni(C 3 H 10 N 2 ) 3 ][Ni(CN) 4 ] M r = Orthorhombic, Pnma a = (12) Å b = (14) Å c = (3) Å Data collection Stoe IPDS diffractometer Absorption correction: Gaussian (XPREP in SHELXTL; Siemens, 1996) T min = 0.580, T max = V = (5) Å 3 Z =4 Mo K radiation = 1.79 mm 1 T = 193 (2) K mm measured reflections 1947 independent reflections 1401 reflections with I > 2(I) R int = Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BG2155). References Brandenburg, K. (2004). DIAMOND. Release 3.1e. Crystal Impact GbR, Bonn, Germany. Bubanec, J., Černák, J., Potočňák, I., Drábik, M. & Lipkowski, J. (2004). Chem. Pap. 58, Černák, J., Orendáč, M., Potočňák, I., Chomič, J., Orendáčová, A., Skoršepa, J. & Feher, A. (2002). Coord. Chem. Rev. 224, Nardelli, M. (1983). Comput. Chem. 7, Paharová, J., Černák, J., Žák, Z. & Marek, J. (2007). J. Mol. Struct. 842, Potočňák, I., Vavra, M., Steinborn, D. & Wagner, C. (2008). Acta Cryst. E64, m235 m236. Rodriguez, V., Gutierrez-Zorrilla, J. M., Vitoria, P., Luque, A., Roman, P. & Martinez-Ripoll, M. (1999). Inorg. Chim. Acta, 290, m324 # 2008 International Union of Crystallography doi: /s

2 metal-organic compounds Saha, M. K., Dey, D. K., Samanta, B., Dey, S. K., Malik, K. M. A. & Mitra, S. (2005). Z. Naturforsch. Teil B, 60, Sheldrick, G. M. (1997). SHELXS97 and SHELXL97. University of Göttingen, Germany. Siemens (1996). XPREP in SHELXTL. Siemens Analytical X-ray Instruments Inc., Madison, Wisconsin, USA. Smékal, Z., Císařová, I. & Mrozinski, J. (2001). Polyhedron, 20, Stoe & Cie (1999). EXPOSE, CELL and INTEGRATE in IPDS. Version Stoe & Cie, Darmstadt, Germany. Kuchár and Černák [Ni(C 3 H 10 N 2 ) 3 ][Ni(CN) 4 ] m325

3 [doi: /s ] Tris(propane-1,2-diamine-κ 2 N,N )nickel(ii) tetracyanidonickelate(ii) Juraj Kuchár and Juraj Černák S1. Comment The title compound, C 13 H 30 N 10 Ni 2, was studied as part of a broader study of cyanocomplexes viewed as magnetic materials [Černák et al.2002). The complex is ionic and built up of [Ni(pn) 3 ] 2+ cations (pn: 1,2-diaminopropane) and [Ni(CN)~4~] 2 anions. Other similar ionic compounds with square tetracyanometallates(ii) and [M(L L) 3 ] 2+ cations (M = Ni, Zn, Cd; L L: a chelating ligand), have already been described [Bubanec et al., 2004; Rodriguez et al., 1999; Paharová et al., 2007]. The Pt analogue was described by Potočňák et al. (2008). The Ni II atom in the complex cation exhibits pseudo-octahedral coordination by six nitrogen atoms from three chelate bonded pn ligands in gauche conformations. As the nickel atom occupies the position on a mirror plane the chelate bonded ligands are disordered in two positions with half occupancy (Fig. 1). Further disorder associated with the position of the methyl groups bonded to the carbon atom was detected so within the same metallocycle both R and S enantiomers are present with the same occupancy. Moreover, the structure is centrosymmetric so both opposite absolute configurations Λδδλ and Δλλδ of the chiral cations are present in the unit cell in equal quantities. It is worth noting that for the synthesis a racemic mixture of the pn ligand was used. The observed geometrical parameters are close to those observed in [Ni(pn) 3 ][Fe(CN) 5 NO].H 2 O [Saha et al., 2005]. The charge of the cation is compensated by a [Ni(CN) 4 ] 2- anion. The latter is bisected by a mirror plane, leading to a rather regular NiC 4 chromophore. The geometric characteristics are similar to those previously reported [Smékal et al., 2001]. The Ni II atoms in the respective ions are not connected by covalent bonds, the shortest distance between Ni II atoms being (1) Å. The cations are connected by a complicated system of weak intermolecular hydrogen bonds of the N H N C Ni C N H N type, in which also the complex anions take part and where the H N distance range is Å. S2. Experimental To 10 ml of a 0.1 M hot solution of NiSO 4.6H 2 O (0.262 g, 1 mmol) 0.35 ml of pn (4 mmol) were added under continuous stirring, followed by addition of 10 ml of a 0.1 M warm solution of K 2 [Ni(CN) 4 ].H 2 O (1 mmol). The resulting clear solution was left for crystallization at room temperature. Single crystals of the title compound, in the form of light violet needles suitable for X-ray studies, appeared after one day. S3. Refinement The structure was solved by direct method. The model (including two 50:50% disordered positions of the pn ligands, forced by the crystallographic mirror symmetry in the cation) was completed by subsequent Fourier syntheses. At this stage the calculated difference Fourier map indicated the presence of further positional disorder of the methyl groups in the pn ligands. The occupational factors refined by fixing the common isotropic thermal parameters of the concerning sup-1

4 carbon atoms indicated 50:50 occupancy which was in the subsequent refinement cycles fixed. Finally, the hydrogen atoms were put in the calculated positions taking into account the observed disorder. Anisotropic thermal parameters were refined for all non-h atoms. All H atoms positions were calculated using the appropriate riding model with isotropic temperature factors being 1.2 times larger then temperature factors of their parent atoms. Geometrical analysis was performed using PARST (Nardelli, 1983) and SHELXL97. Figure 1 View of the complex cation and complex anion of the title compound. The thermal ellipsoids are drawn at 30% probability level. The disordered positions in the complex cation are shown with light colors (i: x, y, z). Tris(propane-1,2-diamine-κ 2 N,N )nickel(ii) tetracyanidonickelate(ii) Crystal data [Ni(C 3 H 10 N 2 ) 3 ][Ni(CN) 4 ] M r = Orthorhombic, Pnma Hall symbol: -P 2ac 2n a = (12) Å b = (14) Å c = (3) Å V = (5) Å 3 Z = 4 Data collection Stoe IPDS diffractometer Radiation source: fine-focus sealed tube Graphite monochromator Detector resolution: 150 pixels mm -1 φ scans F(000) = 936 D x = Mg m 3 Mo Kα radiation, λ = Å Cell parameters from 1308 reflections θ = µ = 1.79 mm 1 T = 193 K Needle, light-violet mm Absorption correction: gaussian (XPREP in SHELXTL; Siemens, 1996) T min = 0.580, T max = measured reflections 1947 independent reflections 1401 reflections with I > 2σ(I) sup-2

5 R int = θ max = 25.0, θ min = 2.9 h = Refinement Refinement on F 2 Least-squares matrix: full R[F 2 > 2σ(F 2 )] = wr(f 2 ) = S = reflections 183 parameters 12 restraints Primary atom site location: structure-invariant direct methods k = l = Secondary atom site location: difference Fourier map Hydrogen site location: inferred from neighbouring sites H-atom parameters constrained w = 1/[σ 2 (F o2 ) + (0.0714P) 2 ] where P = (F o 2 + 2F c2 )/3 (Δ/σ) max < Δρ max = 0.52 e Å 3 Δρ min = 0.60 e Å 3 Special details 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 F 2 against ALL reflections. The weighted R-factor wr and goodness of fit S are based on F 2, conventional R-factors R are based on F, with F set to zero for negative F 2. The threshold expression of F 2 > σ(f 2 ) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 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 (Å 2 ) x y z U iso */U eq Occ. (<1) Ni (7) (4) (2) C (6) (4) (13) N (6) (3) (14) C (5) (3) (3) (10) N (6) (3) (3) (15) C (5) (4) (14) N (6) (4) (15) Ni (6) (4) (2) C (5) (3) (15) H4C * 0.50 C (5) (4) (18) H5C * 0.50 H5D * 0.50 C (5) (3) (3) (2) H6C * 0.50 H6D * 0.50 H6E * 0.50 H6F * 0.50 C (5) (3) (3) (16) H7C * 0.50 H7D * 0.50 C (10) (7) (6) (3) 0.50 sup-3

6 H8C * 0.50 H8D * 0.50 H8E * 0.50 N (6) (4) (3) (14) 0.50 H4A * 0.50 H4B * 0.50 N (6) (4) (3) (14) 0.50 H5A * 0.50 H5B * 0.50 N (6) (4) (3) (15) 0.50 H6A * 0.50 H6B * 0.50 N (6) (3) (4) (15) 0.50 H7A * 0.50 H7B * 0.50 C (3) (11) (7) (6) 0.42 (3) H9C * 0.42 (3) H9D * 0.42 (3) H9E * 0.42 (3) N (6) (3) (4) (14) 0.50 H8A * 0.50 H8B * 0.50 N (6) (4) (4) (15) 0.50 H9A * 0.50 H9B * 0.50 C (3) (10) (2) (7) 0.38 (3) H10A * 0.38 (3) H10B * 0.38 (3) H10C * 0.38 (3) C (3) (2) (11) (15) 0.20 H11A * 0.20 H11B * 0.20 H11C * 0.20 Atomic displacement parameters (Å 2 ) U 11 U 22 U 33 U 12 U 13 U 23 Ni (4) (3) (4) (3) C (3) (2) (4) (3) N (4) (4) (3) (3) C (3) (2) (3) (18) (2) (18) N (5) (18) (4) (2) (3) (19) C (3) (3) (4) (3) N (3) (4) (4) (3) Ni (4) (3) (4) (3) C (3) (4) (4) (3) C (4) (5) (3) (3) C (4) (3) (6) (2) (4) (3) sup-4

7 C (4) (3) (4) (3) (3) (3) C (6) (7) (6) (5) (6) (5) N (4) (3) (4) (3) (3) (3) N (3) (3) (4) (2) (3) (3) N (4) (3) (4) (2) (3) (3) N (3) (3) (4) (3) (3) (3) C (16) (6) (7) (7) (7) (5) N (3) (3) (4) (3) (3) (3) N (4) (3) (4) (3) (3) (3) C (12) (8) (15) (8) (13) (8) C (2) 0.20 (4) 0.10 (3) 0.07 (3) (19) 0.08 (3) Geometric parameters (Å, º) Ni1 C (7) C7 C10 i (7) Ni1 C2 i (4) C7 C (7) Ni1 C (4) C7 N (3) Ni1 C (7) C7 N9 i (3) C1 N (7) C7 H7C C2 N (5) C7 H7D C3 N (8) C8 H8C Ni2 N7 i (6) C8 H8D Ni2 N (6) C8 H8E Ni2 N (6) N4 H4A Ni2 N8 i (6) N4 H4B Ni2 N9 i (6) N5 H5A Ni2 N (6) N5 H5B Ni2 N5 i (6) N6 H6A Ni2 N (6) N6 H6B Ni2 N (6) N7 H7A Ni2 N4 i (6) N7 H7B Ni2 N6 i (5) C9 H9C Ni2 N (5) C9 H9D C4 C (10) C9 H9E C4 N (3) N8 C6 i (3) C4 C (6) N8 H8A C4 H4C N8 H8B C5 N (3) N9 C7 i (3) C5 H5C N9 H9A C5 H5D N9 H9B C6 C (7) C10 C7 i (7) C6 N (3) C10 H10A C6 C (6) C10 H10B C6 H6C C10 H10C C6 H6D C11 H11A C6 H6E C11 H11B C6 H6F C11 H11C sup-5

8 C1 Ni1 C2 i (14) C9 C7 C (11) C1 Ni1 C (14) N7 C7 C (4) C2 i Ni1 C (3) N9 i C7 C (4) C1 Ni1 C (2) C9 C7 H7C C2 i Ni1 C (14) N7 C7 H7C C2 Ni1 C (14) C6 C7 H7C N1 C1 Ni (5) C10 i C7 H7D N2 C2 Ni (5) C4 C8 H8C N3 C3 Ni (5) C4 C8 H8D N7 Ni2 N (2) H8C C8 H8D N7 i Ni2 N8 i 92.6 (2) C4 C8 H8E N7 i Ni2 N9 i 90.7 (2) H8C C8 H8E N8 i Ni2 N9 i (19) H8D C8 H8E N7 Ni2 N (2) C4 N4 Ni (3) N8 Ni2 N (19) C4 N4 H4A N8 i Ni2 N5 i 93.3 (2) Ni2 N4 H4A N9 i Ni2 N5 i 95.7 (2) C4 N4 H4B N8 Ni2 N (2) Ni2 N4 H4B N9 Ni2 N (2) H4A N4 H4B N7 Ni2 N (2) C5 N5 Ni (3) N8 Ni2 N (19) C5 N5 H5A N9 Ni2 N (2) Ni2 N5 H5A N5 Ni2 N (19) C5 N5 H5B N7 i Ni2 N4 i 94.3 (2) Ni2 N5 H5B N8 i Ni2 N4 i (19) H5A N5 H5B N9 i Ni2 N4 i 94.9 (2) C6 N6 Ni (3) N5 i Ni2 N4 i (19) C6 N6 H6A N7 i Ni2 N6 i (19) Ni2 N6 H6A N8 i Ni2 N6 i 92.4 (2) C6 N6 H6B N9 i Ni2 N6 i (2) Ni2 N6 H6B N5 i Ni2 N6 i 93.3 (2) H6F N6 H6B N4 i Ni2 N6 i 93.3 (2) H6A N6 H6B N7 Ni2 N (19) C7 N7 Ni (4) N8 Ni2 N (2) C7 N7 H7A N9 Ni2 N (2) Ni2 N7 H7A N5 Ni2 N (2) C7 N7 H7B N4 Ni2 N (2) Ni2 N7 H7B C8 C4 N (5) H7A N7 H7B C8 C4 C (5) C7 C9 H9C N4 C4 C (4) C7 C9 H9D C8 C4 H4C C7 C9 H9E N4 C4 H4C C6 i N8 Ni (4) C5 C4 H4C C6 i N8 H8A N5 C5 C (4) Ni2 N8 H8A N5 C5 H5C C6 i N8 H8B C4 C5 H5C Ni2 N8 H8B N5 C5 H5D H8A N8 H8B C4 C5 H5D C7 i N9 Ni (3) sup-6

9 H5C C5 H5D C7 i N9 H9A C11 C6 N (13) Ni2 N9 H9A C11 C6 C (13) C7 i N9 H9B N6 C6 C (4) Ni2 N9 H9B N6 C6 H6C H9A N9 H9B C7 C6 H6C C7 i C10 H10A N6 C6 H6D C7 i C10 H10B C7 C6 H6D H10A C10 H10B H6C C6 H6D C7 i C10 H10C C7 C6 H6E H10A C10 H10C C7 C6 H6F H10B C10 H10C H6E C6 H6F C6 C11 H11A C9 C7 N (7) C6 C11 H11B C10 i C7 N9 i (14) H6E C11 H11B C10 i C7 C (9) C6 C11 H11C Symmetry code: (i) x, y+1/2, z. Hydrogen-bond geometry (Å, º) D H A D H H A D A D H A N4 H4A N2 ii (7) 167 N5 H5A N2 iii (6) 169 N5 H5B N (8) 159 N6 H6A N2 ii (7) 152 N6 H6B N (7) 147 N7 H7A N1 iv (8) 158 N7 H7B N1 v (7) 145 N8 H8A N1 iv (8) 179 N9 H9A N2 iii (8) 144 Symmetry codes: (ii) x+1, y, z; (iii) x+1, y+1/2, z; (iv) x 1/2, y, z+1/2; (v) x 1, y, z. sup-7