an fscanf() somehow cancels variables in a struct

Question

i recently started doing an exercise where I had to write numbers in an array of structs. The problem I faced was that when I used fscanf() at the end of the code, the variables in the node array were being deleted. I don't know if it's a memory problem, because I'm still a noob in C. Here's the code:

#include <stdio.h>
#include <stdlib.h>

int main(){
    FILE *f = fopen("grafo.txt" , "r");
    char tempRead[1] = "~";
    int endReadFlag = 0;
    int nodeCounter = 0;
    char alph[12] = "abcdefghijk";

    // if the file cant open
    if (f == NULL){
        printf("Errore");
        exit(1);
    }

    // Counting nodes
    while(endReadFlag == 0){
        fscanf(f, "%s" , &tempRead);
        if (strcmp(tempRead, ";") == 0){
            nodeCounter++;
        } else if (strcmp(tempRead, ".") == 0){
            tempRead[0] = "z";
            endReadFlag = 1;
        }
    }
    endReadFlag = 0; // resetting flag

    // Creating node structure
    struct Nodo{
        char name;
        char adiacenze[nodeCounter][1];
    };
    struct Nodo nodi[nodeCounter];

    // Creating structs
    for(int i = 0 ; i < nodeCounter ; i++){
        nodi[i].name = alph[i];
        //printf("%c" , nodi[i].name);
    }

    rewind(f); // rewindin the file

    // Setting chains in the struct array
    for(int i = 0 ; i < nodeCounter ; i++){
        for(int j = 0 ; j < nodeCounter + 2; j++){
            fscanf(f , "%s", &tempRead);
            printf("%c" , nodi[i].name);
        }
    }


    return 0;
}