Most squaraines are encumbered by nucleophilic attack of the central four membered ring, which is highly electron deficient.
12.
In this reaction the leaving group is an electron deficient acyl group ( owing to the presence of three fluorine groups ).
13.
But I don't see how RCOOH is any more electron deficient compared to R ( C = O ) H.
14.
However, an electron deficient metal is more favorable for the transmetalation and reductive elimination steps, making electron withdrawing ligands the best here.
15.
BF 3 is commonly referred to as " electron deficient, " a description that is reinforced by its exothermic reactivity toward Lewis bases.
16.
The 2-, 4-, and 6-positions on the pyrimidine ring are electron deficient analogous to those in pyridine and nitro-and dinitrobenzene.
17.
As a pioneer in the field of computational chemistry, Schleyer identified a number of new molecular structures, especially related to lithium chemistry and electron deficient systems.
18.
In this reaction, either the diborane dissociates forming BH 3 as an intermediate or one B H B bridge opens to produce an electron deficient boron atom.
19.
When this electron is removed by a chemical reaction with an electron deficient element ( like Chlorine ) the element is more stable because the inner shell is filled.
20.
The formation of the clusters could be seen as a way to'condense out'( localize ) the electron deficient bonding into bonds of a more localized nature.
