On the other hand, the LUMO orbital can accept electrons from the metal using anti-bonding orbitals to form feedback bonds are saturated around the coumarin ring [48].
In fact, the LUMO orbital can accept the electrons in the d orbital of the metal using anti-bonding orbitals to form a feedback bond.
Therefore, this represent a strong anti-bond to form stable chelates (feedback bond) and lead to greater adsorption with the metal protected from the corrosion in acid media (Herrag et al. 2010).
It has also been reported that excellent inhibition corrosion properties are usually obtained using organic compounds that not only offer electrons to unoccupied orbitals of the metal but also accept free electrons from the metal by using their anti-bond orbitals to form stable chelates (feedback bond) (Herrag et al. 2010; Fang and Li 2002).
Thus, by forming feedback bonds, the chemical adsorption of inhibitor molecule on the steel surface increases and the inhibition efficiency also increases (Herrag et al. 2010).
The region of highest electron density, HOMO, are the sites at which electrophiles attack and represents the active sites with the utmost ability to bond to the metal surface, whereas the LUMO orbital can accept electrons from the 3d orbital of the Fe atom to form feedback bonds.
Carrière, Picea glauca Voss, Selaginella moellendorffii Hieron., Vitis vinifera L., Cucumis sativus L., and Zea mays L. The potential functions were mainly related to ionic bonding, oxidation reduction processes, and feedback regulation (Table 3).
This argues that the problems are deeper than a lack of fiscal discipline: there is a flaw in the way the euro zone was designed, without a lender of last resort, without joint bonds and with a vicious feedback loop that weakens both sovereigns and their banks.
The maximum updates rates are reached while performing drag operations with the mouse, where there is continuous feedback by trailing bond lines or the current location of moved or rotated structure parts.
Hence, the transducer can provide a feedback for real-time bond quality control and thus can be called a 'smart transducer'.
