Organometallic chemistry.(Brief Article)

Chemistry and Industry;  December 18, 2000 ;   BURGESS, KEVIN;   578 words ......reaction of aryl bromides with phenoxides (see Figure 1) there was an induction period in which...perphenylated in the induction period (see Figure 2). Preparation, isolation and testing...Hartwig's catalytic process is depicted (see Figure 3). In this, aromatic amines add to ...

Organometallic chemistry.(palladium catalysis)(Brief Article)

Chemistry and Industry;  June 12, 2000 ;   BURGESS, KEVIN;   595 words ......imply that an intermediate complex (2) (see Figure 1) may be formed from several different...selectively at the least hindered C-H bonds (see Figure 2). Evidence is presented that the reaction...then trans-addition of these to alkynes (see Figure 3). The net effect of these ...

Organic chemistry.(aromatic molecules)(Brief Article)

Chemistry and Industry;  December 18, 2000 ;   STEPHENSON, G RICHARD HOLMES, ANDREW B;   787 words ......cyclophanes (1), helps this process (see Figure 1). It has now been found that switching...derives from coupling two diyne units (see Figure 2). These components were then capped...contain highly-emissive fluorophores (see Figure 3). Langmuir-Blodgett techniques can...

Organic chemistry.(Technical)

Chemistry and Industry;  August 21, 2000 ;   HOLMES, ANDREW B STEPHENSON, G RICHARD;   787 words ......with polyhydroxylated cyclooctanes (5) (see Figure 1). The eight-membered ring compounds...amino sugar occurring in vancomycin (see Figure 2). The Nozaki--Kishi-coupled product...of allyl esters (11) into urethanes (see Figure 3). The carboxylate residue released...

Organic chemistry.(Brief Article)

Chemistry and Industry;  March 20, 2000 ;   HOLMES, ANDREW B STEPHENSON, G RICHARD;   787 words ......are interesting for different reasons (see Figure 1). The diterpene brassicolene (1) has...and this has now inspired a synthesis (see Figure 2) based on a sequence of furan ring...the product. A nice way around this (see Figure 3) is the homologation of an enol triflate...

Organic chemistry.(Statistical Data Included)

Chemistry and Industry;  November 15, 1999 ;   HOLMES, ANDREW B. STEPHENSON, G. RICHARD;   735 words ......and then form a Lewis acid complex (3) (see Figure 1). Many Lewis acids were examined, and...products can be readily reductively cleaved (see Figure 2). J L Hubb and C H Heathcock report...lactam is reduced to the saturated amine (see Figure 3). Under these conditions the aminal...

Organic chemistry.(includes multiple research results)(Brief Article)

Chemistry and Industry;  October 16, 2000 ;   HOLMES, ANDREW B STEPHENSON, G RICHARD;   535 words ......naphthalene-derived components have been made (see Figure 1) by building outward from 1,5-diethers...Elaborate azulene-linked structures (see Figure 2) such as (7) can also be built up by...E W Meijer (Nature, 2000, 407, 167) (see Figure 3). The monomers assemble by forming...

Organic chemistry. (Highlights).(Brief Article)

Chemistry and Industry;  November 19, 2001 ;   Holmes, Andrew B. Stephenson, G. Richard;   787 words ......of tetrabutylammonium fluoride (TBAF) (see Figure 1). Following this approach and working...unsymmetrical triyne in ichthyothereol (5) (see Figure 2). This has been incorporated from a...in this case, unsymmetrical diyne (7) (see Figure 3). Wittig--Horner step to make an enediyne...

Innovation in concrete frame construction

Concrete;  October 1, 2005 ;   Nolan, Éanna;   787 words ......concrete framed structures in the UK(1-5) (see Figure 1). A recent study by BRE looked at its...reinforcement (shear ladders, studs, rails (see Figure 2) and stirrups) can be used to replace...being very important for the future (see Figure 3), with reported benefits being reduced...

Smooth sailing for Spinnaker Tower, Portsmouth

Concrete;  July 1, 2003 ;   Hayward, David;   787 words ......the revitalised harbour at Portsmouth (see Figure 1). Intended as an international landmark...concrete masts have risen 3m each day (see Figure 2). The tower has excited a great deal...mix with relatively late initial set (see Figure 3). The solution was a critical balance...

Organic chemistry.

Chemistry and Industry;  December 20, 1999 ;   HOLMES, ANDREW B STEPHENSON, G RICHARD;   787 words ......library of hydroxy-substituted arylpyrones (see Figure 1). The precursor to the pyrone was a...which (3) is a representative example (see Figure 2). Prolific synthesis of this type exploits...solution-phase diazoketone dimerisation (see Figure 3). Polyhaloaromatic tags were ...

Organic chemistry.(carbene insertions to extend hydrocarbon chains)(Brief...

Chemistry and Industry;  October 15, 2001 ;   HOLMES, ANDREW B STEPHENSON, G RICHARD;   776 words ......introduce [CH.sub.2] groups sequentially (see Figure 1). Ratios of the simple chain extension...produce (4) (Org. Lett., 2001, 3, 3033) (see Figure 2). The smallest bridgehead diazene...substituent providing a classic example (5) (see Figure 3). The adamantyl group has a pleasing...

The new development driving contractors up the wall

Concrete;  April 1, 2006 ;   Thomas, Glyn;   787 words ......the world of vertical wall stamping (see Figure 1). The vertical wall stamping system...drywall, stone or existing concrete (see Figure 2). The prepared surface must be porous...will be achieved using the texture mats (see Figure 3). Texturing Specially adapted stamps...

Integrated Delivery Systems: Professional Practice Models.

Nursing Economics;  March 1, 2001 ;   Pinkerton, SueEllen;   787 words ......the benefit of one structure for a PPM (see Figure 1) but the component parts can be adapted for each organization in the IDS (see Figure 3). [ILLUSTRATIONS OMITTED] The PPM in...feedback loop, and is within a boundary (see Figure 2). The elements of the systems model...

Organic chemistry. (Highlights).

Chemistry and Industry;  March 17, 2003 ;   Stephenson, G. Richard;   512 words ......carbonates to form benzodioxins (see Figure 1a). with chirality in the heterocyclic ring. The mechanism (see Figure 2) proposed starts with the classic...of 2 and 3 shows a typical example (see Figure 1b). The anticipated mechanism starts...