4-(Dimethyl-amino)phenyl ethynyl telluride

The title compound, C(10)H(11)NTe, is the first organyl ethynyl telluride, R-Te-C C-H, to be structurally characterized. In the L-shaped mol-ecule, the aryl moiety, viz. Me(2)NC(6)H(4)Te, is almost perpendicular to the Te-C C-H fragment. The Te-Csp(2) bond [2.115 (3) Å] is significantly longer than the Te-Csp bond [2.041 (4) Å]. The Te-C C group is approximately linear [Te-C-C = 178.5 (4)° and C C = 1.161 (5) Å], while the coordination at the Te atom is angular [C-Te-C = 95.92 (14)°]. In the crystal structure, there are Csp-H⋯N hydrogen bonds which are perpendicular to the CNMe(2) group; the N atom displays some degree of pyramidalization. Centrosymmetrically related pairs of mol-ecules are linked by Te⋯π(ar-yl) inter-actions, with Te⋯Cg = 3.683 (4) Å and Csp-Te⋯Cg = 159.1 (2)° (Cg is the centroid of the benzene ring). These inter-actions lead to the formation of zigzag ribbons which run along c and are approximately parallel to (110

Diammonium tris­[hexa­aqua­magnesium(II)] tetra­kis­[hydrogenphosphate(III)], (NH4)2[Mg(H2O)6]3(HPO3)4

The framework of the title compound is made up of discrete Mg(H2O)6 octa¬hedra, and HPO3 and NH4 tetra¬hedra, which are organized in planes parallel to (010). Strong hydrogen bonding between the building units stabilizes the structure. The hydrogenphosphate(III) tetra¬hedra, the ammonium tetra¬hedron and one of the two Mg atoms lie on positions with m symmetry, whereas the second Mg atom is located on a position with 2/m symmetry

Twinning by merohedry in bis(4-methoxyphenyl)tellurium(IV) diiodide dimethyl sulfoxide hemisolvate

Green crystals of the title compound, C14H14I2O2Te.0.5C2H6OS, space group P32, show twinning by merohedry (class II). The asymmetric unit contains two organotellurium molecules and one dimethyl sulfoxide (DMSO) molecule. The crystal structure displays secondary Te I and Te O(DMSO) bonds that lead to [(4-MeOC6H4)2TeI2]2.DMSO supramolecular units in which the two independent organotellurium molecules are bridged by the DMSO O atom. In addition to these secondary bonds, I I interactions link translationally equivalent organotellurium molecules to form nearly linear I-Te-I I-Te-I chains. These chains are crosslinked, forming two-dimensional arrays parallel to (001). The crystal packing consists of a stacking of these sheets, which are related by the 32 axis. This study describes an unusual dimeric arrangement of X-Te-X groups

Dibromobis(4-methoxyphenyl)tellurium(IV)

The structur analysis shows that the title compound, [TeBr2(C7H7O)2], is isostructural with the corresponding dichloro compound. There are two molecules in the asymmetric unit in which the Te atom has pseudotrigonal bipyramidal coordination geometry. The two independent molecules, along with their centrosymmetric equivalents, form isolated tetramers by means of Te…Br contacts ranging from 3.535 (1) to 3.741(1) A

Bis(p-methoxyphenyl) Telluride

The title compound, C14H14O2Te, displays an angular geometry at tellurium, with a C-Te-C angle of 99.5(1)º and Te-C distances of 2.110(3) and 2.112(3)A. The Te atom is displaced by 0.1963(3) and 0.0044(3)A out of the planes of the aromatic rings. These rings are approximately perpendicular to one another [dihedral angle 70.4(1)º], while each methoxy group is almost coplanar with the phenyl ring to which it is bonded [dihedral angles 3.3(2) and 1.5(3)º]

Two Polymorphs of Bis(4-methoxyphenyl)tellurium(IV) Diiodide

The title compound, (C7H7O)2Tel2 (orC14H14I2O2Te), crystallizes in space group P1, either with Z = 8, (Ia), or Z = 4, (Ib). The six independent molecules [four in (Ia) and tow in (Ib)] have very similar structures. The geometry at the Te atoms is pseudo-trigonal bipyramidal, with the I atoms in the axial positions and the anisyl groups and the lone pair of electrons in the equatiorial plane. The Te-C and Te-I distances are in the ranges 2.107(4)-2.128(6) and 2.8549 (10)-3.0071(10) A, respectively. In both polymorphs, the molecules are associated via Te...I secondary bonds [3.6922(6)-3.9017(7)A] to form centrosymmetric tetramers in which the Te4I8 cores display step-like geometries. Including the secondary interactions, the coordination about each Te atom is distorted octahedral

Aqua(glycinato)(3,4,7,8-tetramethyl-1,10-phenanthroline)copper(II) Nitrate

In the title compound, [Cu(C2H4NO2)(C16H16N2)-(H2O)]NO3, CuII displays distorted square-pyramidal coordination where the water molecule is in the apical position and the base is defined by the N and one of the O atoms from the glycinate ligand, and both phenanthroline N atoms. The phenanthroline chelate-ring plane (N1, C12, C11, N2, Cu) is slightly distorted from planarity, whereas the five-membered ring formed by the glycinate ligand (defined by atoms N3, C18, C17, O1 and Cu), presents a distorted half-chair conformation

Triple-Decker [Cp*Fe(C8H6)Fe(C8H7)]

The title compound [2(1,2,3,3a,6a-ƞ)pentalene]-[l(ƞ5)-pentamethylcyclopentadienyl]diiron, [Fe2(C8H7)-(C10H15)(C8H6)], has a metallocenic structure with the two pentalene ligands adopting an eclipsed conformation. In the central pentalene ligand, all the peripheral bonds are of similar length whereas the bridge bond is longer; there are two significantly different Fe-C distances, i.e. a mean value of 2.121(3)A for the Fe-Cbridge distances and a mean value of 2.028(3)A for the distances from the Fe atoms to all other Catoms. In the terminal pentalene ligand, the C-C and C-Fe distances in the ring bonded to the Fe atom are all similar

Structure of (1S,6S,8S,9S,1'S)-8-(1'-hydroxyethyl)-9-hydroxymethyl-1,5,5-trimethylbicyclo[4.3.0]nonane

C15H28O2, Mr=240.39, orthorhombic, P212121, a=6.518(2), b=12.849(5), c=17.796(7)A, V=1490.4(9)A3, Z=4, DX=1.07 Mg m-3, (Mo Ka)=0.71069 A, µ=0.07 mm-1, F(000)=536, R=0.039 and wR=0.038 fo 893 observed reflections, T=293 K. the absolute configuration was not determined; stereochemistry at the 8 and 1' positions is established. The cyclohexane and cyclopentane rings have chair and half-chair conformations, respectively, and are transfused