what is the difference between nucleophile and base ? which among oH^ and SH^ is better nuleophile or base ?
![G 3648 SH 1S PAN 48 x 36 CenturyStone Alcove Shower Base with Center Drain in Beach Granite | Shower Base, Aquarius en G 3648 SH 1S PAN 48 x 36 CenturyStone Alcove Shower Base with Center Drain in Beach Granite | Shower Base, Aquarius en](https://res.cloudinary.com/american-bath-group/image/upload/websites-product-info-and-content/aquarius/product-info/shower-bases/as000135/images/aquarius-as000135-000-beg.jpg)
G 3648 SH 1S PAN 48 x 36 CenturyStone Alcove Shower Base with Center Drain in Beach Granite | Shower Base, Aquarius en
![G 6038 SH PAN 4.0 ANSI-B 38 x 60 AcrylX Alcove Shower Base with Center Drain in White | Shower Base, Aquarius en G 6038 SH PAN 4.0 ANSI-B 38 x 60 AcrylX Alcove Shower Base with Center Drain in White | Shower Base, Aquarius en](https://res.cloudinary.com/american-bath-group/image/upload/websites-product-info-and-content/aquarius/product-info/shower-bases/as003002/images/aquarius-as003002-000-wht.jpg)
G 6038 SH PAN 4.0 ANSI-B 38 x 60 AcrylX Alcove Shower Base with Center Drain in White | Shower Base, Aquarius en
![Sh-Base Replacement for use with the Sh-Mop | Speed Cleaning Products | Professional House Cleaning Supplies Sh-Base Replacement for use with the Sh-Mop | Speed Cleaning Products | Professional House Cleaning Supplies](https://www.speedcleaning.com/assets/images/thumbnails/sh-base_1_thumbnail.png)