What do A pos and C pos mean?
The # column is the rank of each listed entry for Inorganic Chemistry Communication — rank 1 means this entry is where Inorganic Chemistry Communication has the most articles or citations. A pos and C pos show the reciprocal: the position of Inorganic Chemistry Communication within that entry's own ranked list, by articles and citations respectively. A low value means Inorganic Chemistry Communication is among the most prominent contributors for that entry.