Post whit out sidebar

Ey! I need to make some post whith out the sidebar in the right size. I have instaled the plugin “Single Post Template” and I have make a new post template in my panel like this:

<?php
/**
* Template name: post with out sidebar
*/

get_header(); ?>

<div id=”primary” class=”content-area eleven columns”>
<main id=”main” class=”site-main” role=”main”>

<?php if ( have_posts() ) : ?>

<?php /* Start the Loop */ ?>
<?php while ( have_posts() ) : the_post(); ?>

<?php
/* Include the Post-Format-specific template for the content.
* If you want to override this in a child theme, then include a file
* called content-___.php (where ___ is the Post Format name) and that will be used instead.
*/
get_template_part( ‘content’, get_post_format() );
?>

<?php endwhile; ?>

<?php flaton_paging_nav(); ?>

<?php else : ?>

<?php get_template_part( ‘content’, ‘none’ ); ?>

<?php endif; ?>

</main><!– #main –>
</div><!– #primary –>

<?php get_footer(); ?>

but I don′t know what happen, the plugin isn′t running and I can make post with out sidebar. Some one can help me?

This is my page: https://www.lapiznomada.com
I can make pages with out sidebar, but I need make post with out sidebar too.
Help please!!