Transition metals can exhibit varying oxidation states in varying compounds, due to the availability of both the ns electrons and the (n-1)d electrons as valence electrons. for example, mn can have oxidation states of 7 (like in kmno4) or 2 (like in mno) or 4 (like in mno2), etc.. but since mn can’t have an oxidation number higher than its number of valence electrons (7), it could not be in a compound such as mno4. based on knowledge of the electronic configuration of titanium, state which of the following compounds of titanium is unlikely to exist.

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

What is the gold assay