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Crystal structure of 1,1,2,2-tetra-methyl-1,2-bis-(2,3,4,5-tetra-methyl-cyclo-penta-2,4-dien-1-yl)disilane.

ABSTRACT: The mol-ecular structure of the title compound, C22H38Si2, features a trans arrangement of the cyclo-penta-dienyl rings to avoid steric strain [C-Si-Si-C torsion angle = -179.0 (5)°]. The Si-Si bond length is 2.3444 (4) Å. The most notable inter-molecular inter-actions in the mol-ecular packing are C-H⋯π contacts that lead to the formation of wave-like supra-molecular chains along the b axis.

SUBMITTER: Godemann C

PROVIDER: S-EPMC4644997 | biostudies-literature |

REPOSITORIES: biostudies-literature

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cyclo-Tri-?-oxido-tris-{[(?,?)-1,2-bis-(cyclo-penta-dien-yl)-1,1,2,2-tetra-methyl-disilane]zirconium(IV)}: a trimeric disila-bridged oxidozirconocene.

Project description:The title compound, [Zr(3)(C(14)H(20)Si(2))(3)O(3)], consists of three disila-bridged zirconocene units, which are connected via an oxide ligand, forming a nearly planar six-membered ring with a maximum displacement of 0.0191?(8)?Å. The compound was isolated as a by-product from a mixture of [(C(5)H(4)SiMe(2))(2)ZrCl(2)] and Li[AlH(4)] in Et(2)O.

| S-EPMC3099787 | biostudies-literature

(?-Benzophenone)(?-penta-methyl-cyclo-penta-dien-yl)ruthenium(II) tetra-phenyl-borate.

Project description:The structure of the title compound, [Ru(C(10)H(15))(C(13)H(10)O)](C(24)H(20)B), consists of discrete [Cp*Ru(II)benzophenone] cations and tetra-phenyl-borate anions (Cp* = penta-methyl-cyclo-penta-dien-yl). Tethering the Cp*Ru group to one aryl ring of benzophenone results in average values of 1.42?(1) and 1.38?(1)?Å for the C-C bond lengths in the Ru-tethered and untethered phenyl rings, respectively. The dihedral angle between the benzene and phenyl rings of the benzophenone group is 50.5?(1)°.

| S-EPMC2971317 | biostudies-literature

Bis(η(5)-penta-methyl-cyclo-penta-dien-yl)aluminium tetra-bromido-aluminate.

Project description:The title compound, [Al(C10H15)2][AlBr4], was formed during the reduction of a mixture of Cp*AlBr2 and AlBr3. The Al(III) atoms of the two crystallographically independent cations each lie on an inversion center, and the [AlBr4](-) anions are on general positions. At 123 K, the structure exhibits disorder in two of the Br atoms of the [AlBr4](-) ion, with a ratio occupancy of 0.733 (6): 0.267 (3). In the crystal, there is possible weak hydrogen bonding between some methyl groups and Br atoms. The interactions link the moieties in a three-dimensional array.

| S-EPMC3998496 | biostudies-literature

[1-Dimethyl-silyl-2-phenyl-3-(?-tetra-methyl-cyclo-penta-dien-yl)-prop-1-en-1-yl-?C](?-penta-methyl-cyclo-penta-dien-yl)titanium(III).

Project description:The title compound, [Ti(C(10)H(15))(C(20)H(26)Si)], was obtained from the reaction of [Ti{?(5):?(1)-C(5)Me(4)(CH(2))}(?(5)-C(5)Me(5))] with the alkynylsilane PhC(2)SiMe(2)H. The complex crystallizes with two independent mol-ecules in the asymmetric unit, which differ in the conformation of the propenyl unit, resulting in their having opposite helicity. No inter-molecular inter-actions or inter-actions involving the Si-H bond are present. The observed geometrical parameters are unexceptional compared to known structures of the same type.

| S-EPMC2971020 | biostudies-literature

trans-Di-?-carbonyl-bis-{carbon-yl[?-2,3,4,5-tetra-methyl-1-(5-methyl-2-fur-yl)cyclo-penta-dien-yl]ruthenium(I)}(Ru-Ru).

Project description:In the crystal structure of the title compound, [Ru(2)(C(14)H(17)O)(2)(CO)(4)], each Ru(I) atom is connected to one end-on and two bridging carbonyl groups and one cyclo-penta-dienyl ring. The two Ru atoms are connected into binuclear complexes via two bridging carbonyl groups, forming four-membered rings which are located on centres of inversion. The Ru-Ru distance of 2.7483?(11)?Å corresponds to a single bond. The two carbonyl groups in these binuclear complexes are trans-oriented.

| S-EPMC2977131 | biostudies-literature

Acetonitrile-dicarbon-yl(?-penta-methyl-cyclo-penta-dien-yl)iron(II) tetra-fluorido-borate.

Project description:In the structure of the title compound, [Fe{?(5)-C(5)(CH(3))(5)}(NCCH(3))(CO)(2)]BF(4), the arrangement of ligands around the Fe atom is in a pseudo-octa-hedral three-legged piano-stool fashion in which the penta-methyl-cyclo-penta-dienyl (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.

| S-EPMC3151746 | biostudies-literature

Trichlorido-1?Cl,2?Cl-(2,6-dimethyl-phenolato-2?O)-?-oxido-bis{1,2(?)-2,3,4,5-tetra-methyl-1-[4-(trimethyl-silyl)phen-yl]cyclo-penta-dien-yl}dititanium(IV).

Project description:The title dinuclear titanocene, [Ti(2)(C(8)H(9)O)(C(18)H(25)Si)(2)Cl(3)O], contains one Ti atom tetra-hedrally coordinated by two Cl atoms, a bridging O atom and the substituted cyclo-penta-dienyl ligand, and another Ti atom tetra-hedrally coordinated by a Cl atom, a bridging O atom, the 2,6-dimethyl-phenolate ligand and the substituted cyclo-penta-dienyl ligand. The bridging O atom lies on a twofold rotation axis.

| S-EPMC3201525 | biostudies-literature

Di-?2-chlorido-bis-[chlorido(?(5)-2,3,4,5-tetra-methyl-1-propyl-cyclo-penta-dien-yl)iridium(III)].

Project description:The asymmetric unit of the title complex, [Ir2Cl4(C12H19)2], a versatile starting material for the preparation of uniquely substituted penta-alkyl-cyclo-penta-dien-yl-iridium complexes, consists of an iridium(III) atom, a substituted cyclo-penta-dienyl ligand and two chlorine ligands. The full dimer is generated by an inversion center. In the dimer, the two Ir(III) atoms and two bridging Cl atoms form a perfectly planar ring. The two Ir(III) atoms and the two terminal Cl atoms also form a rigorous plane that is orthogonal [89.48?(3)°] to the Ir2Cl2 ring. The plane of the cyclo-penta-dienyl ligand forms a dihedral angle of 54.06?(7)° with respect to the Ir2Cl2 ring.

| S-EPMC3588487 | biostudies-other

(?-Penta-methyl-cyclo-penta-dien-yl)(?-4-phenyl-butan-2-one)ruthenium(II) tetra-phenyl-borate.

Project description:The title compound, [Ru(C(10)H(15))(C(10)H(12)O)][B(C(6)H(5))(4)], crystallizes as discrete (?(5)-penta-methyl-cyclo-penta-dien-yl)Ru(?(6)-4-phenyl-butan-2-one)](+) cations and [BPh(4)](-) anions. In the cation, the non-H atoms of the butan-2-one group are approximately planar (r.m.s. deviation = 0.056?Å) and lie nearly perpendicular to the plane of the phenyl ring with a dihedral angle between the two planes of 69.3?(1)°. No significant C-H?O inter-actions are observed between the methyl and phenyl H atoms and the carbonyl O atom.

| S-EPMC3011665 | biostudies-literature

(η-Penta-methyl-cyclo-penta-dien-yl)(η-p-toluene-sulfonamide)ruthenium(II) tetra-phenyl-borate.

Project description:The crystal structure of the title compound, [Ru(C(10)H(15))(C(7)H(9)NO(2)S)]C(24)H(20)B, has been determined as part of our investigation into the structural and biological properties of organometallic Ru(II)-arene-Cp* complex salts of the type [R-PhRuCp*](+)·X(-) (where Cp* is penta-methyl-cyclo-penta-diene). Tethering the RuCp* group to the benzene ring of p-toluene-sulfonamide results in only minor changes to the mol-ecular geometry of the sulfonamide, but, together with crystallization as the [BPh(4)](-) salt, effectively blocks involvement of the sulfonamide group in N-H⋯O hydrogen-bonding networks.

| S-EPMC2960125 | biostudies-literature

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