Question

The total number of coordination sites in ethylenediaminetetraacetate () is_______.

Answer 1

Hint: The coordination number of an atom refers to the total number of atoms, ions, or molecules bonded to that atom in a certain molecule or crystal. The ligancy of an atom is frequently referred to as its coordination number. The ligands are the atoms, ions, or molecules bonded to the central atom (molecule/ion). The ligancy of molecules is computed differently when estimating the coordination number of a central atom in a crystal.

Complete Step by Step Solution:
\[{\left[ {C{H_2}N{{(C{H_2}C{O_2}H)}_2}} \right]_2}\] is the formula for the aminopolycarboxylic acid ethylenediaminetetraacetic acid (EDTA). two. Iron and calcium ions are typically bound with this water-soluble whitish material. As a hexadentate ("six-toothed") chelating agent, it binds these ions. Disodium EDTA, sodium calcium edetate, and tetrasodium EDTA are some of the different types of EDTA. In coordination chemistry, \[EDT{A^{4 - }}\] belongs to the aminopolycarboxylic acid family of ligands. In most cases, the two amines and four carboxylates in \[EDT{A^{4 - }}\] bind to a metal cation.

Image: Structure of \[EDT{A^{4 - }}\]
The \[EDT{A^{4 - }}\] coordination number is \[6\] . The number of ligand atoms directly linked to the core metal atom or ion via the coordinate bond is the metal's or ion's coordinate number. The number of chemical bonds produced between the ligand and the core metal atom or ion is the number of chemical bonds made between the ligand and the core metal atom or ion.

Note: Concerns about the biodegradability of aminopolycarboxylates such as EDTA have generated concern about environmental safety. As a result of these concerns, researchers are looking for alternative aminopolycarboxylates. Potential chelating agents include nitrilotriacetic acid (NTA), iminodisuccinic acid (IDS), polyaspartic acid, S,S-ethylenediamine-N,N′-disuccinic acid (EDDS), methylglycinediacetic acid (MGDA), and L-glutamic acid N,N-diacetic acid, tetrasodium salt (GLDA).