Chem 250 is a one semester organic course. There is no lab associated with Chem 250. Those needing an organic course with a laboratory component should take one of the course sequences given below. Many departments do not accept Chem 250 as the organic requirement. You should check your major department's requirements. Prerequisite: minimum grade of C- in Chem 110 or 111.
CHEM 261, 262, 269
The Chem 261 and 262 lecture courses and the Chem 269 lab course constitute the two semester sequence of organic chemistry with lab required by most departments. Chemistry majors are required to take the Chem 265, 266, 267, 268 sequence. Some examples of majors who normally take the Chem 261, 262, 269 sequence include biochemistry, chemical engineering, environmental science, nutrition, and biology, as well as those students in the pre-med and pre-vet programs. Because Chem 250 has no associated lab, those students who need an organic course with lab should take Chem 261, 262, and 269. Prerequisite for Chem 261: minimum grade of C- in Chem 112 or 122. For Chem 262: minimum grade of C- in Chem 261. Prerequisite or corequisite for Chem 269: Chem 262. Chem 269 is usually taken concurrently with Chem 262 but because of space limitations, especially in the Spring semesters, many students may have to take the lab during the following semester.
CHEM 265, 266, 267, 268
The Chem 265 and 266 lecture courses are taken by Chemistry Majors only. The Chem 267 and 268 lab courses are taken by Chemistry Majors only. Material in this sequence is covered in more depth and with more rigor than that in the other organic courses. Prerequisite for Chem 265: a minimum grade of C- in Chem 112 or 122H. For Chem 266: a minimum grade of C- in Chem 265. Chem 267 must be taken concurrently with Chem 265 and Chem 268 must be taken concurrently with Chem 266.
CHEM 263 and 264
Taken together, these are equivalent to Chem 269. These courses are offered only in the summer. If you are a UMass student and plan to take Organic Lab over the summer you must take both 263 and 264. If you only take Chem 263 you will have to take the entire Chem 269 course during the regular academic year.