In the title complex, [Mn(C(10)H(7)N(6))(2)(H(2)O)(4)], the Mn(2+) cation is located on a twofold rotation axis and is coordinated by two N atoms from two 5-[4-(imidazol-1-yl)phen-yl]tetra-zolide ligands and four O atoms from four water mol-ecules, displaying a distorted MnN(2)O(4) octa-hedral geometry. The crystal structure is stabilized by intermolecular O-H⋯N hydrogen bonds involving the coo...

A uthor...................... ................................................................ Department of Electric$ Engineering and Computer Science January 25, 2006 Certified by....... .............................. Jin A. Kong Professor of Electrical Engineering Thesis Supervisor C ertified by.. ............................................ Bae-Ian Wu Research Scientist Thesis Supervisor Ac...

In the title compound, NH(4) (+)·(C(2)H(5)O)(2)PS(2) (-), the ammonium cation is connected by four charge-assisted N-H⋯S hydrogen bonds to four tetra-hedral O,O'-diethyl dithio-phosphate anions, forming layers parallel to (100). The polar and non-polar constituents of the layers are stacked alternately along [100]. Inter-lacing of the external ethyl groups through van der Waals inter-actions co...

Single crystals of yttrium penta-phosphate(V), YP(5)O(14), were obtained by solid-state reaction. The ortho-rhom-bic title compound belongs to the family of ultraphosphates and is the second polymorph of this composition. It is isotypic with its Ho and Er analogues. The structure contains two bridging Q(2)-type PO(4) tetra-hedra and one branching Q(3)-type PO(4) tetra-hedron, leading to infinit...

In the title compound, [Cd₂I₄(C₆H₁₄N₂)₂](n), there are two independent Cd(II) ions. One Cd(II) ion is coordinated in a slightly distorted octa-hedral coordination environment by four N atoms from two cyclo-hexane-1,2-diamine ligands and two iodido ligands. The other Cd(II) ion is coordinated by four iodido ligands in a slightly distorted tetra-hedral coordination environment. Two of the iodido ...

In the title compound, C(6)H(16)N(4)O(4)·4H(2)O, the tetra-zinane mol-ecule lies across an inversion centre. The tetra-zinane ring adopts a chair conformation, and all imino H atoms occupy axial positions. In the crystal, adjacent mol-ecules are linked through O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds with water mol-ecules generating a three-dimensional network.

The title compound, Eu(11)Zn(6)As(12), crystallizes with the Sr(11)Cd(6)Sb(12) structure type (Pearson's symbol mC58). The complex monoclinic structure of the first arsenide to form with this type features chains made of corner-sharing ZnAs(4) tetra-hedra, separated by Eu atoms. There are a total of 15 unique positions in the asymmetric unit. Except for one Eu atom with site symmetry 2/m, all a...

The title compound, (C(10)H(28)N(4))[MnCl(4)(H(2)O)(2)]Cl(2)·2H(2)O, consists of isolated octa-hedral [MnCl(4)(H(2)O)(2)](2-) anions, tetra-protonated 1,4,8,11-tetra-azoniacyclo-tetradecane cations, chloride anions and water mol-ecules connected by a network of hydrogen bonds. The Mn(II) atom is situated on an inversion centre, and the 1,4,8,11-tetra-azoniacyclo-tetradecane cation is located on...

This paper, partly tutorial in nature, describes an approach to the implementation of the 4.567 kbps TETRA speech codec on the TMS320C54x DSP family. The TETRA system is introduced and its speech codec is described in detail. The TETRA standard describes the speech codec in bit-exact, fixed-point C-code. Our paper compares the efficiency of implementing this code by first writing it in C and cr...