catena-Poly[{μ-η5:η5-1-[2-(dimethyl­amino)­ethyl-κN]cyclo­penta­dien­yl}-lithium(I)-(μ-1,1,3,3-tetra-tert-butyl­triphosphane-κ3 P 2:P 1,P 3)lithium(I)]

The title compound, [Li2(C9H14N)(C16H36P3)]n, is a by-product of the reaction of [Cp(C5H4CH2CH2NMe2)ZrCl2]n with tBu2P–P(SiMe3)Li in toluene. It is a coordination polymer composed of infinite chains running along [010]. One Li(I) atom is chelated by the cyclo­penta­dienyl ring and and the N atom of the scorpionate ligand and a P atom, whereas the other Li(I) atom is coordinated by the backside of the cyclo­penta­dienyl ring and two P atoms. Both Li(I) atoms adopt a distorted trigonal coordination. The structure was determined from a twinned crystal, but only the data from the main twin component was used. The fraction of components in the crystal was 0.555:0.445 and the twin matrix corresponds to twofold rotation about the c axis (00/00/001)

catena-Poly[[(tetra­hydro­furan-κO)lithium(I)]-bis­(μ-trimethyl­silanolato-κ2 O:O)-gallium(III)-bis­(μ-trimethyl­silanolato-κ2 O:O)-[(tetra­hydro­furan-κO)lithium(I)]-μ-bromido]

The title chain polymer compound, [GaLi2Br(C3H9OSi)4(C4H8O)2]n, was obtained in the reaction of GaBr3 with Me3SiOLi in toluene/tetra­hydro­furan. The GaIII atom, located on a twofold rotation axis, is coordinated by four trimethyl­silanolate ligands and has a distorted tetra­hedral geometry. The LiI atom is four coordinated by one bridging Br atom located on an inversion centre, two trimethyl­silanolate ligands and one tetra­hydro­furane mol­ecule in a distorted tetra­hedral geometry. The polymeric chains extend along [001]. The tetra­hydro­furane mol­ecule is disordered over two positions with site-occupancy factors of 0.57 (2) and 0.43 (2)

1,1,2,2-Tetra­kis(diisopropyl­amino)diphosphane

In the title compound, C24H56N4P2, the distance between the P atoms [2.2988 (8) and 2.3013 (13) Å in the major and minor occupancy components, respectively] is one of the longest reported for uncoordinated diphosphanes. The whole mol­ecule is disordered over two positions with site-occupation factors of 0.6447 (8) and 0.3553 (8). The structure adopts the synperiplanar conformation in the solid state [N—P—P—N torsion angle = 14.7 (5)°]

5,5-Dimethyl-2-methyl­seleno-1,3,2-dioxaphospho­rinan-2-one

The title compound, C6H13O3PSe, was obtained in the reaction of 5,5-dimethyl-2-oxo-2-seleno-1,3,2-dioxaphospho­r­inane potassium salt with methyl iodide. The seleno­methyl group is in the axial position in relation to the six-membered dioxaphospho­rinane ring

2,4-Bis[bis(diisopropyl­amino)­phos­phanyl]-1,2,3,4-tetra­phospha­bicyclo[1.1.0]butane

The title compound, C24H56N4P6 or (iPr2N)2P–P4–P(NiPr2)2, adopts a butterfly structure, with planar environments for the N atoms and pyramidal environments for the P atoms. The structure studied has a 15% twin component that is related by a twofold rotation about [100]

Propuesta de intervención en el Cuarto Real de Santo Domingo (Granada)

El Cuarto Real de Santo Domingo en Granada es, -en palabras de los autores de este artículo-, el edificio clave para el análisis de la arquitectura y la decoración en la transición del arte postalmohade al nazarí. Es de destacar el rigor de la investigación, la minuciosidad de los levantamientos gráficos mediante técnicas taquimétricas y fotogramétricas, así como la apuesta comprometida contenida en la propuesta de liberación y de repristinación que incluye la alberca y el jardín.Ayuntamiento de GranadaPeer reviewe

Dispiro­[cyclo­propane-1,5′-endo-tricyclo­[5.2.1.02,6]deca-3,8-diene-10′,1′′-cyclo­propane]

The title compound, C14H16, is built up from three five-membered rings. Two of the five-membered rings display an envelope conformation and the third one is almost planar (r.m.s. deviation = 0.014 Å)

Chlorido(η5-cyclo­penta­dien­yl)[(4a,4b,8a,9,9a-η)-fluoren­yl](fluorenyl-κC 9)zirconium(IV) toluene solvate

In the title compound, [Zr(C5H5)(C13H9)2Cl]·C7H8, the ZrIV atom is coordinated by a Cl atom, a cyclo­penta­dienyl (Cp) ligand [Zr–centroid (Cp) = 2.199 (3) Å] and two fluorenyl ligands (Fl) [Zr–centroid (Fl) = 2.273 (2) Å and Zr—CH from fluorenyl = 2.355 (2) Å] in a distorted tetra­gonal geometry. The dihedral angles between the mean planes of the fluorenyl ring systems and the Cp ring are 36.62 (6)° for the η1-coordinated fluorenyl and 52.85 (6)° for the η5-coordinated fluorenyl, while the dihedral angle between the mean planes of the two fluorenyl ring systems is 76.18 (7)°

trans-Dichloridobis(triisopropyl­phosphine-κP)palladium(II)

The title compound, [PdCl2(C9H21P)2], is a centrosymmetric mononuclear palladium(II) complex. The PdII atom, which lies on an inversion center, is in a square-planar geometry

(Di-tert-butyl­phosphan­yl)bis­(diphenyl­phosphan­yl)phosphane

The title phosphane, C32H38P4 or (Ph2P)2P(PtBu2), has a P atom that is linked to another three P atoms in a pyramidal configuration; the P—P distances in the range 2.2231 (7)–2.2446 (7) Å indicate that the P—P bonds are single bonds