Poly[octacarbonylheptakis(tetrahydrofuran)diironmanganesedisodium(2 Mn—Fe)]

The title compound is a xenophilic transition-metal cluster with short iron–manganese bonds of 2.6274 (10) and 2.6294 (10) Å. The complex forms a polymeric (two-dimensional) structure through isocarbonyl linkages between the sodium cations and the Fe(CO)4 fragments of the cluster.


data reports Synthesis and crystallization
All manipulations were conducted using inert atmosphere techniques. In a dry box Na 2 Fe(CO) 4 (0.997 g, 4.66 mmol) and MnCl 2 (1.181 g, 9.384 mmol) were added to a 150 mL Schlenk flask with a magnetic stirring bar. The flask was closed with a rubber septum then transferred to a Schlenk line. To this flask, 75 mL of anhydrous THF were added and the reaction mixture was stirred rapidly. The solution formed a deep yellow-orange color as the THF was added. The mixture was stirred for 30 minutes then allowed to settle for 24 h. The bright-orange solution was decanted from the solids into another Schlenk flask. The solution was placed into a freezer at À15 C. Large block-like yellow crystals formed after several days. At 25 C the complex rapidly decomposes when exposed to oxygen and when the crystals are removed from the mother liquor. A single crystal was coated with NVH oil and mounted on a MiTeGen loop under a stream of argon gas then cooled to À45 C for data collection.

Refinement
Crystal data, data collection, and structure refinement details are summarized in Table 1

Figure 1
The asymmetric unit of the title compound, with displacement ellipsoids drawn at the 50% probability level. One tetrahydrofuran molecule coordinating Na2 is statistically disordered. For clarity, atoms C33-C36 are shown isotropically with a 50% probability level and atoms C33A-C36A are not shown.

Figure 2
Packing diagram of the title compound, viewed along the a axis, highlighting the stacking of layers.

data-1
IUCrData ( where P = (F o 2 + 2F c 2 )/3 (Δ/σ) max = 0.001 Δρ max = 0.89 e Å −3 Δρ min = −1.77 e Å −3 Special details 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.