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The synthesis of [Ph4As+]2[Cl4Re(NS)(NSCl)2-] · CH2Cl2 (4) from the reaction of S4N4, Cl4ReN, and Ph4AsCl is reported. CH2Cl2 is used as solvent. The reaction of S4N4 with Re2Cl10 similarly leads to the salt [Ph4As+][Cl2ReNS-] (5) in a smaller yield. 4 crystallizes in the triclinic space group P1̅ with Z = 2, a - 10.434(2), b = 12.1454(6), c = 21.125(2) Å, a = 81.210(6), β = 86.70(1), γ = 76.624(8)°.
Zwischen Höxter und dem südlich davon gelegenem Godelheim liegt, eingeengt von einer Bundesbahnlinie und einer Bundesstraße, eine Kiesgrube. Ihr Besitzer, Herr Michael BIERKOCH, Höxter, stieß dort unter einer 1 m mächtigen Schicht "blauen Tons" immer wieder in etwa 8 m Tiefe auf "torfige Ablagerungen mit Farnresten, Holzstücken, ganze Haselnüssen und einmal auch auf eine kapitale Abwurfstange eines Rothirsches". Diese befindet sich heute in der Sammlung des Städtischen König-Wilhelm-Gymnasiums in Höxter. Aus dieser Schicht gelangte eine Probe vom 8.7.1984 über Herrn Prof. Dr. Helmut DUTHWEILER an das Institut für Vor- und Frühgeschichte der Christian- Albrechts-Universität Kiel, wo es Herr Dr. Fritz-Rudolf AVERDIECK analysierte. Hier sein Gutachten (in Klammern Ergänzungen der Redaktion.
In dieser Arbeit werden folgende Assoziationen des Verbandes Calthion Tx. 1937 em. Lebrun et al. 1949 betrachtet: Scirpetum sylvatici Raiski 1931, Angelico-Cirsietum oleracei Tx. 1937 und Filipendulo-Geranietum palustris W. Koch 1926. Das Scirpetum sylvatici ist im Untersuchungsgebiet selten; Angelico-Cirsietum oleracei und Filipendulo-Geranietum palustris sind dagegen verbreitet und zeigen eine relativ große Variabilität. In den chemischen Bodeneigenschaften wurden folgende Unterschiede festgestellt (relative Schätzung der Mittelwerte): Scirpetum sylvatici typicum: der niedrigste Gehalt an Ca und K, hoher Gehalt an P; Angelico-Cirsietum oleracei: der höchste pH-Wert, ein hoher Gehalt an Ca und Na; Filipendulo-Geranietum palustris: der höchste Gehalt an Ca und Mg, niedriger Stabilitätsfaktor.
By means of differential thermoanalysis, the miscibility of the main polar tetraether lipid of Thermoplasma acidophilum with two ester lipids, dipalmitoyl phosphatidylcholine and dipalmitoyl phosphatidylglycerol, resp., in the presence of excess water was studied. It is shown that with increasing fraction of tetraether lipid in the mixture, the transition range of dipalmitoyl phosphatidylcholine is broadened and the temperature of the maximum heat flow (Tm) is shifted to lower temperatures; furthermore, the enthaply change (ΔH) of the transition declines. Similar results were obtained with mixtures of tetraether lipid with dipalmitoyl phosphatidylglycerol. It is therefore concluded that the main polar tetraether lipid of Thermoplasma acidophilum , which essentially forms monomolecular layers, is able to form stable common phases with bilayer-forming ester lipids. Miscibility of the tetraether lipid with dipalmitoyl phosphatidylglycerol, which are both monovalent anions at neutral pH, is also observed in the presence of high proton or calcium ion concentrations.
The reduction potentials of 40 aromatic nitro compounds Rπ(NO2)n with Rπ = benzene, naphthalene, anthracene, fluorene and carbazole and n = 1 to 4 nitro groups are determined by cyclic voltammetry in DMF under aprotic conditions. The perturbation by the strongly electron accepting substituents can be rationalized via correlation with HMO eigenvalues. Based on reversibility criteria, the electrochemical behaviour is discussed and the compounds are classified with respect to reversible or irreversible one-electron transfer as well as up to 4 (quasi)-reversible reduction steps. The CV data measured can be used to predict redox reactions of aromatic nitro compounds in inert solvents.
The gibba group of Chrysis occurs in many parts of the world. It is characterized in part by a lengthened clypeus. Other features are the usually long malar space, micro-ridging on the scapal basin, a frontal carina (when developed) with a broad M-shape and partial posterior rami (broadly biconvex in one species), tergum II apicolaterally obtuse, and tergum III with 4 teeth or lobes. American forms in the male, and to lesser extent the female, have long whitish hair beneath the head and on the opposing surface of the forecoxae. Other legs are also quite hairy, especially in males. Sternum VIII has ,the posterior one-half poorly developed and membranous.
Australian Chrysis form three closely related groups in addition to a few wide-ranging and apparently adventive species. The latter are lincea Fabricius, schiodtei Dahlbom, fuscipennis Brulle, and fossulata F. Smith. The remaining 23 species, including those presently described, appear to be endemic in the Australia-New Guinea area. Recently, Linsenmaier (1982, Entomofauna 3: 323-349) described a number of new species from Australia. Some of these I have been able to recognize and they are included in the key. Others that I am unable to place, possibly through lack of material, are curtisensis from Queensland and dentifrontis from South Australia. I have seen types of nearly all the species in the key. Institutions and individuals who have provided specimens of the new species herein described are given below.