Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

The use of conductivity measurements in organic solvents for the characterisation of coordination compounds

Organic chemists have always been fascinated by the cyclopropane subunit.1 The smallest cycloalkane is found as a basic structural element in a wide range of naturally occurring compounds.2 Moreover, many cyclopropane-containing unnatural products have been prepared to test the bonding features of this class of highly strained cycloalkanes3 and to study enzyme mechanism or inhibition.4 Cyclopropanes have also been used as versatile synthetic intermediates in the synthesis of more functionalized cycloalkanes5,6 and acyclic compounds.7 In recent years, most of the synthetic efforts have focused on the enantioselective synthesis of cyclopropanes.8 This has remained a challenge ever since it was found that the members of the pyrethroid class of compounds were effective insecticides.9 New and more efficient methods for the preparation of these entities in enantiomerically pure form are still evolving, and this review will focus mainly on the new methods that have appeared in the literature since 1989. It will elaborate on only three types of stereoselective cyclopropanation reactions from olefins: the halomethylmetal-mediated cyclopropanation reactions (eq 1), the transition metal-catalyzed decomposition of diazo compounds (eq 2), and the nucleophilic addition-ring closure sequence (eqs 3 and 4). These three processes will be examined in the context of diastereoand enantiocontrol. In the last section of the review, other methods commonly used to make chiral, nonracemic cyclopropanes will be briefly outlined.

Stereoselective Cyclopropanation Reactions

Publisher Summary This is one of two articles in this volume that is concerned with the borane-carborane structural pattern. In the other, Williams has shown how the pattern reflects the coordination number preferences of the various atoms involved. The purpose of the present article is to note some bonding implications of the pattern, and to show its relevance to a wide range of other compounds, including metal clusters, metal-hydrocarbon 7∼ complexes, and various neutral or charged hydrocarbons. Boranes and carboranes may be regarded as cluster compounds in the sense defined by Cotton; they contain a finite group or skeleton of atoms held together entirely, mainly, or at least to a significant extent by bonding directly between those atoms, even though some other atoms may be associated intimately with the cluster. Examples of their structural pattern, however, can be found far beyond the confines of what is normally regarded as cluster chemistry, so this survey includes many systems not commonly referred to as clusters.

Structural and Bonding Patterns in Cluster Chemistry

Porphyrin-based photosensitizers for use in photodynamic therapy

Oxidative addition of pentaborane(9) and bromopentaborane(9), the crystal structure of 2-(irbr2(co)(p(ch3)3)2).b5h8

Nitrosyl Complexes of Technetium: Synthesis and Characterization of [Tc(I)(NO)(CNCMe3)5](PF6)2and Tc(NO)Br2(CNCMe3)3and the Crystal Structure of Tc(NO)Br2(CNCMe3)3.

Un complexe de coordination d'un liant isonitrile et d'un radionucleide tel que Tc, Ru, Co, Pt, Fe, Os, Ir, W, Re, Cr, Mo, Mn, Ni, Rh, Pd, Nb et Ta, est utile en tant qu'agent diagnostic pour l'etiquetage de liposomes ou de vesicules, et des cellules vivantes selectionnees contenant des membranes de lipides, tels que des caillots sanguins, des tissus du myocarde, des tissus de la vesicule biliaire, etc.

Complexes isonitriles de radionucleides pour agents d'etiquetage et mise en image.

Darstellung und kristallstruktur eines sterisch ungehinderten tetraedrischen chelatkomplexes, (spme2npme2s)2ni(ii) mit einem nis4-kern

Stereochemisch nicht starre organometall-molekuele 24. mitt. darst. und nmr von stereochemisch nicht starren cyclooctatetraenderivaten von rutheniumcarbonyl

Alan Davison

Papers

Oxidative addition of pentaborane(9) and bromopentaborane(9), the crystal structure of 2-(irbr2(co)(p(ch3)3)2).b5h8

Nitrosyl Complexes of Technetium: Synthesis and Characterization of [Tc(I)(NO)(CNCMe3)5](PF6)2and Tc(NO)Br2(CNCMe3)3and the Crystal Structure of Tc(NO)Br2(CNCMe3)3.

Complexes isonitriles de radionucleides pour agents d'etiquetage et mise en image.

Darstellung und kristallstruktur eines sterisch ungehinderten tetraedrischen chelatkomplexes, (spme2npme2s)2ni(ii) mit einem nis4-kern

Stereochemisch nicht starre organometall-molekuele 24. mitt. darst. und nmr von stereochemisch nicht starren cyclooctatetraenderivaten von rutheniumcarbonyl