Unusual Structural Types in Manganese Cluster Chemistry from the Use ofN,N,N‘,N‘-Tetrakis(2-hydroxyethyl)ethylenediamine:  Mn8, Mn12, and Mn20Clusters

2008 ◽  
Vol 47 (2) ◽  
pp. 621-631 ◽  
Author(s):  
Rashmi Bagai ◽  
Khalil A. Abboud ◽  
George Christou
Keyword(s):  
Manganese Cluster ◽  
Cluster Chemistry ◽  
Structural Types

Unusual Structural Types in Nickel Cluster Chemistry from the Use of Pyridyl Oximes: Ni5, Ni12Na2, and Ni14Clusters

2008 ◽  
Vol 47 (24) ◽  
pp. 11825-11838 ◽  
Author(s):  
Theocharis C. Stamatatos ◽  
Albert Escuer ◽  
Khalil A. Abboud ◽  
Catherine P. Raptopoulou ◽  
Spyros P. Perlepes ◽  
...  
Keyword(s):  
Cluster Chemistry ◽  
Structural Types ◽  
Nickel Cluster

Unusual Fe9 and Fe18 structural types from the use of 2,6-pyridinedimethanol in FeIII cluster chemistry

2010 ◽  
Vol 39 (38) ◽  
pp. 9131 ◽  
Author(s):  
Taketo Taguchi ◽  
Michael S. Thompson ◽  
Khalil A. Abboud ◽  
George Christou
Keyword(s):  
Cluster Chemistry ◽  
Structural Types

scholarly journals A new twist on an old ligand: a [Mn16] double square wheel and a [Mn10] contorted wheel

2021 ◽  
Vol 8 (7) ◽  
pp. 1804-1809 ◽  
Author(s):  
Thomais G. Tziotzi ◽  
Marco Coletta ◽  
Mark Gray ◽  
Cameron L. Campbell ◽  
Scott J. Dalgarno ◽  
...  
Keyword(s):  
Manganese Cluster ◽  
Cluster Chemistry

The use of 1,3,5-tri(2-hydroxyethyl)-1,3,5-triazacyclohexane (LH3) in manganese cluster chemistry leads to the synthesis of a {Mn16} double square wheel and a {Mn10} contorted wheel.

Macropolyhedral Boron-Containing Cluster Chemistry. A Metallathiaborane from S2B17H17: Isolation and Characterisation of [(PMe2Ph)2PtS2B16H16]; A neo-arachno Ten-Vertex Cluster Shape, and the Constitution of the [arachno-B10H15]- Anion

2005 ◽  
Vol 70 (4) ◽  
pp. 430-440 ◽  
Author(s):  
Michael J. Carr ◽  
Michael G. S. Londesborough ◽  
Jonathan Bould ◽  
Ivana Císařová ◽  
Bohumil Štíbr ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Sodium Hydride ◽  
Hydrogen Atoms ◽  
Subsequent Reaction ◽  
Cluster Chemistry ◽  
Cluster Shape ◽  
Open Face

The deprotonation of S2B17H17 with sodium hydride and subsequent reaction with [PtCl2(PMe2Ph)2] gives the new macropolyhedral metallathiaborane [(PMe2Ph)2PtS2B16H16], of which the cluster consists of a conventional eleven-vertex nido {SB10} unit, fused, with two boron atoms in common, with a {PtSB8} unit of unique ten-vertex neo-arachno constitution and geometry. The latter geometry suggests a configuration for the previously structurally uncharacterised [B10H15]- anion; starting from this configuration, DFT calculations of structure and thence of boron nuclear shieldings, which are found very closely to mimic those found experimentally, thence support a fluxional structure for [B10H15]- with three {BHB(bridging)} and two {BH(endo)} hydrogen atoms around a six-membered open face.

Crystal structure of KBSi3O8 isostructural with danburite

1993 ◽  
Vol 57 (386) ◽  
pp. 157-164 ◽  
Author(s):  
Mitsuyoshi Kimata
Keyword(s):  
Crystal Structure ◽  
Direct Method ◽  
Crystal Chemical ◽  
Chemical Formula ◽  
Crystal Chemical Formula ◽  
3 Dimensional ◽  
Tetrahedral Sites ◽  
Structural Types ◽  
Coupled Substitution ◽  
Insight Into

AbstractThe crystal structure of KBSi3O8 (orthorhombic, Pnam, with a = 8.683(1), b = 9.253(1), c = 8.272(1) Å,, V = 664.4(1) Å3, Z = 4) has been determined by the direct method applied to 3- dimensional rcflection data. The structure of a microcrystal with the dimensions 20 × 29 × 37 μm was refined to an unweightcd residual of R = 0.031 using 386 non-zero structure amplitudes. KBSi3O8 adopts a structure essentially different from recdmergneritc NaBSi3O8, with the low albite (NaAlSi3O8) structure, and isotypic with danburite CaB2Si2Os which has the same topology as paracelsian BaAl2Si2O8. The chenfical relationship between this sample and danburitc gives insight into a new coupled substitution; K+ + Si4+ = Ca2+ + B3+ in the extraframework and tetrahedral sites. The present occupancy refinement revealed partial disordering of B and Si atoms which jointly reside in two kinds of general equivalent points, T(1) and T(2) sites. Thus the expanded crystal-chemical formula can be written in the form K(B0.44Si0.56)2(B0.06Si0.94)2O8The systematic trend among crystalline compounds with the M+T3+T4+3O8 formula suggests that they exist in one of four structural types; the feldspar structures with T3+/T4+ ordered and/or disordered forms, and the paracelsian and the hollandite structures.

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