May 1998 issue
cif-access (inorganic compounds)
The structure of Li8−xTaxP4 (x = 0.5) has been refined in the space group Fm3m [a = 5.999(1)Å]. It has an anti-CaF2 type structure in which the tetrahedral site is statistically occupied by Li and Ta atoms surrounded by P atoms.
cif-access (metal-organic compounds)
The structure of (C16H36N)2[Mo6O19], originally determined at room temperature [Rheingold et al. (1993). Acta Cryst. C49, 756-758], has been redetermined at 148 K.
This is a rare example of a trinuclear rhenium–mercury carbonyl cluster complex containing a bridging phosphanido ligand.
In contrast to related homonuclear complexes, the MnReP2 ring in this complex is not planar and the C6H11 and H groups at both phosphanido bridges are in syn positions.
This is the first crystallographically characterized dirhenium carbonyl complex to contain one chloro and one phosphanido bridge.
The structure of lithium bis(trimethylsilyl)amide etherate has been determined at low temperature using improved metrical data.
cif-access (organic compounds)
In the structure of this compound, inversion-related molecules form O-H⋯O hydrogen-bonded dimers which are linked by C-H⋯O intermolecular hydrogen bonds to form an infinite chain along the b direction. Molecules in different chains are linked by N-H⋯O hydrogen bonds.
The structure of this compound was redetermined at 150 K in the search for new polymorphs or phase transitions. Like the analogous triphenylphosphonium methylide, only one polymorph is found at low and room temperature. This is in contrast to the selenium compound, which presents a different form at low temperature.
This compound exhibits both intramolecular (N-H⋯O) and intermolecular (O-H⋯Br) hydrogen bonding. The latter results in the formation of infinite one-dimensional chains of alternating cations and anions.
LiAsF6.H2O is isostructural with NaPF6.H2O. The structure contains AsF6 octahedra connected by water molecules via weak F⋯H-O hydrogen bonds.