And there's also the S three hexenisomer or the Z three hexane isomer. Now, trans simply means the smaller H groups are on opposite sides of the double bond, while the E means that the two higher priority groups are in opposite sides of our double bond. Likewise, sin simply means that the two H groups are on the same side of the double bond, while the Z means that the two priority, the higher priority groups are the same side of the double bond. So we have trans and we have the CIS three hexane. So let's examine our three dimensional model of this three hexane. So here we have our CIS three hexane.