modi­a­gram – Draw­ing molec­u­lar or­bital di­a­grams

The pack­age pro­vides an en­vi­ron­ment MO­di­a­gram and some com­mands, to cre­ate molec­u­lar or­bital di­a­grams us­ing TikZ. For ex­am­ple, the MO di­a­gram of di­hy­dro­gen would be writ­ten as: \be­gin{MO­di­a­gram}  \atom{left}{ 1s = {0;up} }  \atom{right}{ 1s = {0;up} }  \molecule{ 1sMO = {1;pair, } }\end{MO­di­a­gram} The pack­age also needs the l3k­er­nel and l3­pack­ages bun­dles from the LaTeX 3 ex­per­i­men­tal dis­tri­bu­tion.