Two binuclear molecular magnets: K\\r sub/2sub\\r Fe\\r sub/2sub\\r (C\\r sub/2sub\\r O\\r sub/4sub\\r )Cl\\r sub/6sub\\r (H\\r sub/2sub\\r O)\\r sub/2sub\\r and K\\r sub/6sub\\r Fe\\r sub/6sub\\r (C\\r sub/2sub\\r O\\r sub/4sub\\r )\\r sub/3sub\\r Cl\\r sub/14sub\\r (H\\r sub/2sub\\r O)\\r sub/10sub