CHEMISTRY COMMUNITY

Carlos Gomez 3H

In a similar case, I believe the use of both amine and ammine will be accepted as well. One is just newer.

Carlos Gomez 3H

Using the Greek prefixes bis-, tris-, tetrakis-, etc. if the ligand already contains a Greek prefix simply means that if the ligand already contains the prefixes di-, tri-, tetra- or hexa- in its name then you should use the other set of prefixes (bis-, tris-, tetrakis-, etc.) to distinguish the coo...

Carlos Gomez 3H

I thought that the prefix mono- was only used when naming what type of dentate the ligand is, such as monodentate, bidentate, or tridentate.

Carlos Gomez 3H

When naming coordination compounds, the oxidation number is found by finding the charge of each ligand and the overall charge of the compound (seen outside of the brackets). You need to simply add up each charge and determine what oxidation number of the transition metal would satisfy the overall ch...

Carlos Gomez 3H

I think chlorine can be labeled as both chloro and chlorido (as it is in the textbook). My TA used chloro and he said he did not think it mattered. Chlorido is just a new form used. Ethylenediamine is labeled "bis" because it already has the suffix of di- in its name, so bis is used to dis...

Carlos Gomez 3H

The reason why water can act as a Bronsted acid is because it donates an H+ proton.

Carlos Gomez 3H

I would think it is best to know the difference between both and how to identify a chemical as a bronsted base/acid or a lewis acid/base and how they correlate with each other.

Carlos Gomez 3H

I believe the book refers to this as completely deprotonated as well.

Carlos Gomez 3H

When looking at a chemical formula, the coordination number will tell you how many ligands are attached to the central atom. If there are more than one ligands then the chemical is a polydentate, and these vary from bidentate to hexadenate. A chelate would have a ring structure and a polydentate wou...

Carlos Gomez 3H

I believe chelates are ring-shaped with the metal ion in the middle surrounded by ligands in the coordination sphere.

Carlos Gomez 3H

I agree to draw the Lewis Structure and count how many ligands attach to the central atom and how many loan pairs are present as well.

Carlos Gomez 3H

I do know that coordination compunds with a square planar shape are for atoms and ions with d8 electron configurations such as Pt2+ and Au3+.

Carlos Gomez 3H

Also keep in mind that ligands must have one or more lone pairs.

Carlos Gomez 3H

Monodentate means that there is only one binding site to the central atom, but polydentate means that there is more than one binding site to the central atom, which means it can be either bi-, tri, or hexadentate. A bidentate donates 2 electron pairs (2 sites). A tridentate donates 3 electron pairs ...

Carlos Gomez 3H

The number of ligands can be known from either a picture of the coordination compound and counting the amount of attachments to the central atom, or by looking at the coordination number(s) in the compound name or chemical formula.

Carlos Gomez 3H

A ligand can be an ion or a molecule that is a Lewis base (electron donor) that binds to the central atom or ion in the d-metal complex. They are important because they help make coordination compounds.

Carlos Gomez 3H

Just to add to this, the electrons in double and triple bonds do not have as much repulsion as lone pair electrons because they are in stable bonds with other electrons and it is harder for bonded electrons to move freely in space, just as double and triple bonds are harder to break.

Carlos Gomez 3H

The difference between an equatorial and axial lone pair is that an axial lone pair is on the axis of the molecule, as seen most commonly in the octahedral, trigonal bipyramidal, see saw, and square pyramidal shapes. The axial lone pair strongly repels the electron pairs in the three equatorial bond...

Carlos Gomez 3H

The strengths of the repulsions are as follows:
lone pair-lone pair > lone pair-atom > atom-atom
Also, keep in mind that the lowest energy is achieved when the lone pairs are as far from each other as possible, and this is where the length of the bond angles come into play.

Carlos Gomez 3H

The way I answered the problem was that the shape of ClO2 + ion is angular but the electron arrangment is trigonal planar because there is a lone pair on the central atom Cl and this lone pair would make the bond angle slightly less than 120 degrees.

Carlos Gomez 3H

An octahedral shape needs 6 surrounding atoms around the central atom and if a molecule has two pairs of lone pair electrons and 4 additional atoms, then the lone pairs would go on the axial position of the octahedral shape because that is where the lone pairs are farthest from each other, which mea...

Carlos Gomez 3H

I think that knowing how to identify both the electron geometry and molecular shape will be important for the upcoming test. Simply remember that the electron geometry only takes into account all regions of high electron density that includes lone pair and bonded electrons. Also keep in mind that a ...

Carlos Gomez 3H

I think it is best to memorize all of the possible shapes and it would possibly help to also understand which shapes can be made from the different electron arrangements, such as an electron arrangement of trigonal planar can lead to an angular molecular shape if I am not mistaken. Just little conne...

Carlos Gomez 3H

Just to add to this, I believe that when the change in energy is positive, the electron moves up in energy levels, and when the change in energy is negative, then there is a loss in energy and the electron goes to a lower energy level.

Carlos Gomez 3H

Does this mean that Pd is another exception along with Cu and Cr?

Carlos Gomez 3H

Just to add to the previous answers, I believe they are the exceptions because adding an electron to the d orbital and removing an electron from the s orbital puts the atoms in the lowest energy state.

Carlos Gomez 3H

Planck's constant is equivalent to 6.63x10^-34 or 6.626x10^-34, depending on the sig figs and is measured in Joules. It is also represented by the variable "h".

Carlos Gomez 3H

Just for quick clarification, the electron that is emitted during the photoelectric effect is released in the form of heat? Or simply just energy? Or does it depend on the type of metal used?

Carlos Gomez 3H

I am a little confused on what the threshold energy concept is about, can someone clarify it in regards to the photoelectric effect?

CHEMISTRY COMMUNITY

Search found 29 matches

Re: Chloro v/s chlorido

Re: Bis, Tris, Tetrakis, etc.

Re: mono- prefix

Re: Oxidation Number

Re: Naming (churro)

Re: Water and Bronsted Acids/Bases

Re: Difference between Lewis and Bronsted

Re: Strong acids and strong bases

Re: polydentates/ chelates

Re: chelates

Re: Coordination Number

Re: Coordination Compounds

Re: Monodentates

Re: Polydentate

Re: Ligands

Re: what is a ligand?

Re: Multiple bonds and electron density

Re: Types of Lone Pairs

Re: VSEPR

Re: Homework Help Chapter 4 #5

Re: Octahedral to Square Planar

Re: Electron geometry vs molecular shape

Re: Naming the Shape

Re: Change in Energy

Re: Electron Configuration

Re: Exceptions to electron configuration

Re: Planck's constant

Re: Photoelectric effect and atomic spectra difference

Threshold energy