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Alexander C. Filippou (born 19 August 1958, Thessaloniki, Greece) has been a Professor of Inorganic Chemistry at the Rheinische-Friedrich-Wilhelms-University Bonn since 2005. [1]
He studied chemistry at the Technical University of Munich from 1976 to 1982, receiving his diploma in 1982 with the thesis "Synthesis of anionic carbyne complexes", in the group of Professor Dr. E.O. Fischer. In 1984 he completed his dissertation "New pathways of synthesis of anionic ketene- and carbyne complexes of 16 Group elements through neutral substituted carbyne-carbonyl complexes" also in the group of Professor Dr. E.O. Fischer at the Institute of Inorganic Chemistry, Technical University of Munich. In 1992 he was postdoctoral lecture qualification in chemistry in the group of Professor Dr. W.A. Herrmann, Technical University of Munich, thesis: "Metal centerad coupling reactions of C1 ligands". In 1992 he was temporary supervisor of the research group of Professor M.L.H. Green in Oxford, starting December 1992 Fellow of St. Matthews College, Oxford.
In 1993 he became professor (C3) of Inorganic Chemistry at the Humboldt-University of Berlin and in 2005 he became professor (W3) of Inorganic Chemistry at the Rheinische Friedrich-Wilhelms-Universitaet Bonn.
Filippou has made a significant contribution in the research of heavier homologues of carbon (Si, Ge, Sn, Pb) regarding the ability to form a triple bond to a metal.
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Sodium perrhenate (also known as sodium rhenate(VII)) is the inorganic compound with the formula NaReO4. It is a white salt that is soluble in water. It is a common precursor to other rhenium compounds. Its structure resembles that of sodium perchlorate and sodium permanganate.
Disilyne is a silicon hydride with the formula Si
2H
2. Several isomers are possible, but none are sufficiently stable to be of practical value. Substituted disilynes contain a formal silicon–silicon triple bond and as such are sometimes written R2Si2 (where R is a substituent group). They are the silicon analogues of alkynes.
Silicon tetraazide is a thermally unstable binary compound of silicon and nitrogen with a nitrogen content of 85.7%. This high-energy compound combusts spontaneously and can only be studied in a solution. A further coordination to a six-fold coordinated structure such as a hexaazidosilicate ion [Si(N3)6]2− or as an adduct with bidentate ligands Si(N3)4·L2 will result in relatively stable, crystalline solids that can be handled at room temperature.
Ulrich "Uli" Kortz is a German chemist and professor, working in the area of synthetic polyoxometalate chemistry.
Michael Pope, was born and educated in England. He received B.A. and D.Phil. degrees from Oxford University. He can be considered as one of the leading and most influential polyoxometalate chemists worldwide. His 1983 book entitled “Heteropoly and Isopoly Oxometalates” is the most cited reference in the field.
Decamethylsilicocene, (C5Me5)2Si, is a group 14 sandwich compound. It is an example of a main-group cyclopentadienyl complex; these molecules are related to metallocenes but contain p-block elements as the central atom. It is a colorless, air sensitive solid that sublimes under vacuum.
Holger Braunschweig is Head and Chair of Inorganic Chemistry at the Julius-Maximilians-University of Würzburg in Würzburg, Germany. He is best known for founding the field of transition metal-boron multiple bonding, the synthesis of the first stable compounds containing boron-boron and boron-oxygen triple bonds, the isolation of the first non-carbon/nitrogen main-group dicarbonyl, and the first fixation of dinitrogen at an element of the p-block of the periodic table. By modifying a strategy pioneered by Prof. Gregory Robinson of the University of Georgia, Braunschweig also discovered the first rational and high-yield synthesis of neutral compounds containing boron-boron double bonds (diborenes). In 2016 Braunschweig isolated the first compounds of beryllium in the oxidation state of zero.
Corinna S. Schindler is a Professor of Chemistry at the University of Michigan. She develops catalytic reactions with environmentally benign metals such as iron, towards the synthesis of biologically active small molecules. For her research in the development of new catalysts, Schindler has been honored with several early-career researcher awards including the David and Lucile Packard Foundation Fellowship in 2016, the Alfred P. Sloan Fellowship in 2017, and being named a member of the C&EN Talented 12 in 2017. Schindler has served on the Editorial Board of Organic and Bimolecular Chemistry since 2018.
Plumbylenes (or plumbylidenes) are divalent organolead(II) analogues of carbenes, with the general chemical formula, R2Pb, where R denotes a substituent. Plumbylenes possess 6 electrons in their valence shell, and are considered open shell species.
Richard Dronskowski is a German chemist and physicist. He is a full professor at the RWTH Aachen University.
Helma B. Wennemers is a German organic chemist. She is a professor of organic chemistry at the Swiss Federal Institute of Technology in Zurich.
Paul Knochel is a French chemist and a member of the French Academy of Sciences.
The borosulfates are heteropoly anion compounds which have sulfate groups attached to boron atoms. Other possible terms are sulfatoborates or boron-sulfur oxides. The ratio of sulfate to borate reflects the degree of condensation. With [B(SO4)4]5- there is no condensation, each ion stands alone. In [B(SO4)3]3- the anions are linked into a chain, a chain of loops, or as [B2(SO4)6]6− in a cycle. Finally in [B(SO4)2]− the sulfate and borate tetrahedra are all linked into a two or three-dimensional network. These arrangements of oxygen around boron and sulfur can have forms resembling silicates. The first borosulfate to be discovered was K5[B(SO4)4] in 2012 by the research group of Henning Höppe, although the compound class as such had been postulated already in 1962 by G. Schott and H. U. Kibbel. Over 80 unique compounds are known as of 2024.
A nitridophosphate is an inorganic compound that contains nitrogen bound to a phosphorus atom, considered as replacing oxygen in a phosphate.
Heteroatomic multiple bonding between group 13 and group 15 elements are of great interest in synthetic chemistry due to their isoelectronicity with C-C multiple bonds. Nevertheless, the difference of electronegativity between group 13 and 15 leads to different character of bondings comparing to C-C multiple bonds. Because of the ineffective overlap between p𝝅 orbitals and the inherent lewis acidity/basicity of group 13/15 elements, the synthesis of compounds containing such multiple bonds is challenging and subject to oligomerization. The most common example of compounds with 13/15 group multiple bonds are those with B=N units. The boron-nitrogen-hydride compounds are candidates for hydrogen storage. In contrast, multiple bonding between aluminium and nitrogen Al=N, Gallium and nitrogen (Ga=N), boron and phosphorus (B=P), or boron and arsenic (B=As) are less common.
Homoleptic azido compounds are chemical compounds in which the only anion or ligand is the azide group, -N3. The breadth of homoleptic azide compounds spans nearly the entire periodic table. With rare exceptions azido compounds are highly shock sensitive and need to be handled with the utmost caution. Binary azide compounds can take on several different structures including discrete compounds, or one- two, and three-dimensional nets, leading some to dub them as "polyazides". Reactivity studies of azide compounds are relatively limited due to how sensitive they can be. The sensitivity of these compounds tends to be correlated with the amount of ionic or covalent character the azide-element bond has, with ionic character being far more stable than covalent character. Therefore, compounds such as silver or sodium azide – which have strong ionic character – tend to possess more synthetic utility than their covalent counterparts. A few other notable exceptions include polymeric networks which possess unique magnetic properties, group 13 azides which unlike most other azides decompose to nitride compounds (important materials for semiconductors), other limited uses as synthetic reagents for the transfer of azide groups, or for research into high-energy-density matter.
René Peters is a German chemist and since 2008 Professor of Organic Chemistry at the University of Stuttgart.
Aluminylenes are a sub-class of aluminium(I) compounds that feature singly-coordinated aluminium atoms with a lone pair of electrons. As aluminylenes exhibit two unoccupied orbitals, they are not strictly aluminium analogues of carbenes until stabilized by a Lewis base to form aluminium(I) nucleophiles. The lone pair and two empty orbitals on the aluminium allow for ambiphilic bonding where the aluminylene can act as both an electrophile and a nucleophile. Aluminylenes have also been reported under the names alumylenes and alanediyl.
Tetrakis(trimethylphosphine)tungsten(II) trimethylphospinate hydride (W(PMe3)4(η2-CH2PMe2)H) is an air-sensitive organotungsten complex with tungsten in the oxidation state of +2. It is an electron-rich tungsten center is and, thus, prone to oxidation. This bright-yellow complex has been used as a starting retron for some challenging chemistry, such as C-C bond activation, tungsten-chalcogenide multiple bonding, tungsten-tetrel multiple bonding, and desulfurization.
Hexakis(trimethylphosphine)tungsten is a tungsten(0) organometallic compound with the formula W(P(CH3)3)6. It is a yellow crystalline solid soluble in organic solvents.
