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Why transition element in zero or lower oxidation sate form complexes with ligands like CO and NO?
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Why do hydrates change in color when water of crystallization is driven off?
In transition metal complexes water as ligands form the coordinate covalent bods and is responsible to split the d-orbitals in to two groups in which transition of electrons produces colour when water is driven off the splitting of d-orbitals becomes vanished and colour disappear.
What is inner metallic complex?
Some ligands such as acetyl acetonato, glycine etc. have both neutral donor and anionic (acidic) groups. Co-ordination number and oxidation state i.e., charge on metal ion gets satisfied simultaneously when metal ions are co-ordinated to such ligands. Complexes so formed are called inner metallic complexes or only inner complex. Examples of inner complexes are:[Co3(gly)3], [Co(acac)3], [Cu(gly)2] and [Cu(big)2]whre, gly = glycinato, acac = acetyl acetanato and big = biguanido.
What is the oxidation number of nh2 oh?
Ox(N)= -3
Why is the oxidation state of fluorine never positive?
An element exhibits a positive oxidation state when it is bonded to a more electronegative element. Fluorine is the most electronegative of all the elements. But what if fluorine bonds with extremely elecronegative oxygen and nitrogen ligands like -OCF3, -OTeF5, -OIO2F2, -N(SO2CF3)2, -N3, -N5(pentazole ligand) etc.? eg: F-OTeF5
What is the oxidation number for elements?
The oxidation number of O in any elemental form (e.g. O2, O3) is zero. Typically in chemical compounds the oxidation number of O is -2 (oxide ion)
What has the author HP Lane written?
H.P Lane has written: 'Transition metal complexes of group fifteen donor ligands'
What has the author Michael William Blackmore written?
Michael William Blackmore has written: 'Some studies on transition metal complexes of nitrogen and oxygen containing ligands, with particular reference to 2-pyridinaldoxime'
What is the oxidation state of cisplatin?
Platinum is connected to two anionic Chloride ligands and two neutral Ammine ligands Platinum = +2 oxidation state Chlorine = -1 oxidation state Nitrogen = -3 oxidation state Hydrogen = +1 oxidation state
What' is oxidation number?
'Oxidation number' and oxidation state are often used interchangeably. Oxidation state is a formal way of determining the degree of oxidation of an atom or ion or molecule; for ions the oxidation number is equal to the ionic charge. In non ionic compounds the most electronegative element is assumed to "own" the electrons. So in say InP which is a semiconductor and not ionic, the oxidation state of indium is +III and P is -III. Oxidation number is a convention used in complexes. Ligands are removed from the ion with all bonding electrons. Often the oxidation number and oxidation state have the same values but calculating the the oxidation number of N in ammonia, H is removed as hydride ion, H- you get the strange looking result of nitrogen with an oxidation number of +3. In contrast the oxidation states of N and H would be calculated as -III and +1
What has the author P M Judd written?
P. M. Judd has written: 'Tetraazamacrocyclic ligands and their copper complexes'
What has the author Jonathan McMaster written?
Jonathan McMaster has written: 'Copper and Zinc complexes of bi-imidazole ligands'
What are complexing agent?
complexing agents are ligands that are capable forming complexes with metal ions by the formation of coordinate bond
Why do hydrates change in color when water of crystallization is driven off?
In transition metal complexes water as ligands form the coordinate covalent bods and is responsible to split the d-orbitals in to two groups in which transition of electrons produces colour when water is driven off the splitting of d-orbitals becomes vanished and colour disappear.
What oxidation number?
'Oxidation number' and oxidation state are often used interchangeably. Oxidation state is a formal way of determining the degree of oxidation of an atom or ion or molecule; for ions the oxidation number is equal to the ionic charge. In non ionic compounds the most electronegative element is assumed to "own" the electrons. So in say InP which is a semiconductor and not ionic, the oxidation state of indium is +III and P is -III. Oxidation number is a convention used in complexes. Ligands are removed from the ion with all bonding electrons. Often the oxidation number and oxidation state have the same values but calculating the the oxidation number of N in ammonia, H is removed as hydride ion, H- you get the strange looking result of nitrogen with an oxidation number of +3. In contrast the oxidation states of N and H would be calculated as -III and +1
What is inner metallic complex?
Some ligands such as acetyl acetonato, glycine etc. have both neutral donor and anionic (acidic) groups. Co-ordination number and oxidation state i.e., charge on metal ion gets satisfied simultaneously when metal ions are co-ordinated to such ligands. Complexes so formed are called inner metallic complexes or only inner complex. Examples of inner complexes are:[Co3(gly)3], [Co(acac)3], [Cu(gly)2] and [Cu(big)2]whre, gly = glycinato, acac = acetyl acetanato and big = biguanido.
What must be use when writing the chemical name for a compound with a transition metal?
When writing the chemical name for a compound with a transition metal, it is important to include the name of the transition metal as well as its oxidation state in Roman numerals. This helps to specify which ion of the transition metal is present in the compound. Additionally, any ligands or other elements in the compound should also be named and included in the chemical name.
Why only transition elements are known to form pi-complexes?
Bonding in π-complexes is strongest when both the filled π-bonding orbital of the π-bonded ligand donates TO the metal and the empty π* orbital on the ligand can accept electron density FROM the metal. A metal with a partially-filled set of d orbitals is able to participate in this synergistic mode of bonding; main group atoms virtually never have filled pπ orbitals available for donating electron density to π-complexed ligand, hence this kind of complex occurs only with transition metals.
