in high accuracy quantum chemical calculations, where treating the whole porphyrin ring would be computationally too demanding. EDDA is larger, with the possibility of forming four bonds with the central magnesium anion: two with deprotonated carboxylic groups and two with nitrogen lone pairs. Por, Chla and BChla are the largest four-dentate ligands, which differ by the saturation of the pyrrolic rings in the macrocycle; two pyrroles are saturated in BChla, one in Chla, and none in Por. In the present approach, Por is void of substituents, whereas Chla and BChla posses all substituents found in their native structures with the exception of phytyl chain, substituted by a hydrogen atom. Among the studied chelates only EN is neutral while the rest of them bear −2 charge, compensating the chargeor the lack of it in ...

'Keep London cabs for us'

'Keep London cabs for us'

On average, twice a week, she takes a taxi from her home in Balmoral to her office or to meet friends or for medical appointments. The corporate communications manager is able to travel without getting out of her wheelchair because SMRT's London cabs ...

Two SMRT lines hit by delays

He got off and took a taxi instead of completing his journey on train. Twitter user "leonardchong" said that his train from HarbourFront had been delayed by "20 to 30 minutes". He added: "Many people walked out to take the bus instead, including me. ...

Kind cabby offers night's earnings to passenger

Kind cabby offers night's earnings to passenger

The two others who received top honours were Madam Faridah