In the recent article $L{i}_{2}Ge{S}_3$ : Lithium Ionic Conductor with an Unprecedented Structural

Type $($Inorganic Chemistry $2023,62,15856-15863$; doi $10\mathrm{.}1021/$acs$.$inorgchem$\mathrm{.}3$c$01431)$

Hong et al$.$ describe a new material for Lithium$-$Ion Batteries $($LIBs$).$ Despite a

stoichiometry of $Ge{S}_3,$ the solid$-$state structure contains a $Ge{S}_4$ unit with shared corners as

depicted in the image below. You will analyze this structure using the tools we have

developed in Module $1.$ When working on this problem, it is highly recommended that you

download and read this paper.

Li$1$

a$)$ What are the formal oxidation states of $Li,Ge,$ and $S$ in $L{i}_{2}Ge{S}_3?$

b$)$ How many valence electrons are present in $L{i}_{2}Ge{S}_3?$

c$)$ Draw the Best Lewis Structure for the GeS$4$ unit. Explicitly show formal charges and any

atoms shared with another unit. Provide a detailed explanation of how your Lewis Structure

has an electron count consistent with the total number of valence electrons available for

$L{i}_{2}Ge{S}_3.$

d$)$ Draw the VSEPR structure for $Ge{S}_4$ and explain the predicted geometry about the Ge

atom. Is this consistent with geometry published in the paper?