1,3-Bis(1-adamant­yl)imidazolium tetra­chloridoferrate(III)

The crystal structure of the title compound, (C23H33N2)[FeCl4], consists of 1,3-bis­(1-adamant­yl)imidazolium (BAIM) cations and tetra­hedral tetra­chloridoferrate(III) (TCF) anions. The BAIM cation possesses m symmetry, with the central imidazole ring and four C atoms of each terminal adamantyl group located on a mirror plane. The Fe and two Cl atoms of the TCF anion are also located on the mirror plane. The cyclo­hexane rings of the adamantyl groups adopt normal chair conformations

1-(4-Bromo­phen­yl)ferrocene

In the title compound, [Fe(C5H5)(C11H8Br)], the distance of the Fe atom from the centroids of the unsubstituted and substituted cyclo­penta­dienyl (Cp) rings is 1.644 (1) and 1.643 (1) Å, respectively. The ferrocenyl moiety deviates from an eclipsed geometry, with marginally tilted Cp rings and an inter­planar angle between the Cp and benzene rings of 13.0 (4)°. The crystal structure is stabilized by C—H⋯π inter­actions between a cyclo­penta­dienyl H atom and the cyclo­penta­dienyl ring of a neighbouring mol­ecule

1,3-Bis(2,6-diisopropyl­phen­yl)-4,5-dihydro-1H-imidazol-3-ium triiodide

In the crystal structure of the title compound, C27H39N2 +·I3 −, the imidazolidinium ring is perpendicular to a mirror plane which bis­ects the cation. The dihedral angle between the imidazolidinium ring and the benzene ring is 89.0 (2)°. The triiodide anion also lies on a mirror plane and is almost linear with an I—I—I bond angle of 178.309 (18)°

Bromido-1κBr-tricarbonyl-2κ3 C-(2η5-cyclo­penta­dien­yl)molybdenum(I)tungsten(I)(W—Mo)

The title compound, [WMoBr(C5H5)(CO)3], is built up from a pseudo-square-pyramidal piano-stool coordination around the Mo atom, the important geometry being Mo—W = 2.6872 (7) Å, W—Br = 2.5591 (9) Å and Mo—W—Br = 158.35 (3)°

The Benefit and Importance of Mobile Satellite Signal in Northern Nigeria: GPS Approach

A Handheld GPS receiver as tool for training college students on mobile satellite signal propagation was designed using Global Positioning System (GPS) approach. These refer to the experimental setup of the equipment that is the connection done between the GPS receiver with a computer. The satellite propagation data received from the GPS satellite can be recorded continuously with an updates rate of 2 seconds. The experiment was carried out in an open space environment at predetermine locations using simple setup, where a cheap, readily and available portable GPS receiver were connected to the computer to acquire propagation data. The computer was equipped with a self-developed package graphical user interface (GUI) monitoring the propagation information from the GPS satellites and saving the data. The developed system can be set up anywhere at any location.  The sate-up will serve as a database for view and analysis of mobile satellite orbiting the sky of Northern part of Nigeria. Cost effective referring to a low-cost and readily available GPS receiver that can be easily set-up as compared to equipment designed specifically for an experimental purpose that is normally very expensive

2,6-Bis(tosyl­oxymeth­yl)pyridine

The title compound, C21H21NO6S2, is organized around a twofold axis parallel to the crystallographic c axis and containing the N atom and a C atom of the pyridine ring. The tosyl moiety and the pyridine ring are both essentially planar [maximum deviations 0.028 (2) and 0.020 (3) Å, respectively]; their mean planes form a dihedral angle of 33.0 (2)°

Acetonitrile­dicarbon­yl(η5-penta­methyl­cyclo­penta­dien­yl)iron(II) tetra­fluorido­borate

In the structure of the title compound, [Fe{η5-C5(CH3)5}(NCCH3)(CO)2]BF4, the arrangement of ligands around the Fe atom is in a pseudo-octa­hedral three-legged piano-stool fashion in which the penta­methyl­cyclo­penta­dienyl (Cp*) ligand occupies three apical coordination sites, while the two carbonyl and one acetonitrile ligands form the basal axes of the coordination. The Fe—N bond length is 1.924 (3) Å and the Fe—Cp* centroid distance is 1.722 Å

4,6-Bis(diphenyl­phosphan­yl)-2,8-di­methyl­phenoxathiin dichloro­methane monosolvate

The title compound, C38H30OP2S·CH2Cl2, belongs to the xanthene family of ligands containing S- and O-donor atoms in the central heterocylic ring. Positions 2 and 8 on the xanthene backbone are functionalized with methyl groups to allow for the selective functionalization of the backbone at positions 4 and 6 with diphenyl­phosphanyl units. The title compound shows a significant ‘roof-like’ bending along the axis of planarity involving the O- and S-donor atoms and the benzene rings, resulting in a dihedral angle between the mean planes of the benzene rings of 32.88 (13)°

1-(6-Ferrocenylhex­yl)-1H-imidazole

The title compound, [Fe(C5H5)(C14H19N2)], is characterized by a ferrocenyl group separated from an imidazole functionality by a straight-chain hexyl unit. The two cyclo­penta­dienyl rings of the ferrocenyl group show a marginal inward tilt of 2.17 (2)°. The imidazole unit, which is essentially planar (with a maximum deviation of 0.007 A for one of the N atoms) and tilted away from the ferrocenyl group [dihedral angle between the substituted ferrocenyl ring and the imidazole = 122.6 (1)°], is involved in inter­molecular C—H⋯N inter­actions

Dicarbon­yl(η5-cyclo­penta­dien­yl)[2-(phenyl­sulfan­yl)eth­yl]iron(II)

The title compound, [Fe(C5H5)(C8H9S)(CO)2], is a three-legged piano-stool iron(II) complex that is characterized by a thio­ethyl-linked phenyl ring and a cyclo­penta­dienyl moiety that occupies the apical coordination site. The two aromatic rings are essentially planar with the same maximum deviation of 0.009 Å. The mean planes of the phenyl and cyclo­penta­dienyl rings bis­ect at an acute angle of 50.08°