A General Theory for Cluster and Ring Compounds of the Main Group and Transition Elements

1972 ◽  
Vol 236 (68) ◽  
pp. 99-102 ◽  
Author(s):  
D. M. P. MINGOS
Keyword(s):  
General Theory ◽  
Main Group ◽  
Transition Elements ◽  
Ring Compounds

Neue Cyclophosphazene mit Metallen der III. Hauptgruppe als Ringbausteine / New Cyclophosphazenes with Metals of Main Group III as Building Blocks

1994 ◽  
Vol 49 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Reinhard Hasselbring ◽  
Herbert W. Roesky ◽  
Andreas Heine ◽  
Dietmar Stalke ◽  
George M. Sheldrick
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Determination ◽  
Building Blocks ◽  
Main Group ◽  
Ring Formation ◽  
Lewis Acidity ◽  
X Ray ◽  
Group Iii ◽  
Space Groups ◽  
Ring Compounds

Abstract Acylic silylated phosphazenes of the type HN(PR2NSiMe3)2 (1) react quantitatively with molecules MMe3 (M = Al, Ga, In) under ring formation and CH4 evolution. The ring compounds N(PPh2NSiMe3)2AlMe2 (2 a) and N(PPh2NSiMe3)2InMe2 (4 a) have been investiga­ ted by X-ray structure determination. 2a and 4a crystallize in the space groups P 1̄ and P 31, respectively; they show different conformations regarding the cyclohexane framework. NMR spectroscopy of the nuclei in the chelating phosphazene ligand indicates decreasing Lewis acidity of the metal containing fragments in the series AlMe2 ≥ GaMe2 > InMe2.

Organometallic Oxides of Main Group and Transition Elements Downsizing Inorganic Solids to Small Molecular Fragments

2003 ◽  
Vol 103 (7) ◽  
pp. 2579-2596 ◽  
Author(s):  
Herbert W. Roesky ◽  
Ionel Haiduc ◽  
Narayan S. Hosmane
Keyword(s):  
Main Group ◽  
Transition Elements ◽  
Molecular Fragments ◽  
Inorganic Solids

Metal-catalyzed routes to rings, chains, and macromolecules based on inorganic elements

2005 ◽  
Vol 77 (12) ◽  
pp. 1991-2002 ◽  
Author(s):  
Alexandra Bartole-Scott ◽  
Cory A. Jaska ◽  
Ian Manners
Keyword(s):  
Recent Work ◽  
Main Group ◽  
Inorganic Elements ◽  
Transition Elements ◽  
Metal Catalyzed

In this perspective article, some of our recent work directed at the development of new catalytic routes to rings, chains, and macromolecules based on main group and transition elements will be discussed.

Metallradien und Ionenradien

2000 ◽  
Vol 215 (7) ◽  
Author(s):  
Martin Trömel ◽  
Sven Hübner
Keyword(s):  
Transition Metals ◽  
Main Group ◽  
The Other ◽  
Oxidation States ◽  
Transition Elements ◽  
Ionic Radii ◽  
Main Group Elements ◽  
Linear Relationships

Metallic radii and ionic radii are correlated by two linear relationships one of which comprises the main group elements and the transition elements of groups 3 up to 7. The other one refers to the elements of groups 8 up to 12. The valences (oxidation states) of the ions involved equal the group numbers of the main group elements of groups 1 up to 4, and 3 in the case of P, As, Sb, and Bi. The apparent valences W of the transition metals obey the rule W = 7 − |G−7| with

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