Gravar-mail: Crystal structures of 1′-amino­cobaltocenium-1-carb­oxy­lic acid chloride monohydrate and of its azo dye 1′-[2-(1-amino-2,6-dimethylphenyl)diazen-1-yl]cobaltocenium-1-carb­oxy­lic acid hexa­fluorido­phosphate monohydrate