Please help me w/ Biochemistry

[AddisonLawrence03]

I am trying to figure out the IUPAC name for this compound

http://imageshack.us/photo/my-images/823/biochem.png/

[mac léinn]

This is what I came up with.

Finished BIOCHEM last semester, I think this is it:

2,7-dimethyl-4,6,6-triethyl nonane

[AddisonLawrence03]

This is what I came up with.

Finished BIOCHEM last semester, I think this is it:

2,7-dimethyl-4,6,6-triethyl nonane

where did the 2,7 dimethyl come from?

I have 4,4-dimethyl but I dont know how to figure out the rest

[mac léinn]

start at the right (the longest chain down on right)

start counting from the bottom ch3 (as #1) then go up to ch (#2) has ch3 attached

#1 = ch3

#2 = ch has ch3 (methyl)

#3 = ch2

#4 = ch has ch2-ch3 (ethyl)

#5 = ch2

#6 = c (that has ch2-ch3 going up and down)

#7 = ch has ch3

#8 = ch2

#9 = ch3

therefore 2&7 are di(meaning 2) methyl

4,6,6 tri (three of them) ethyl

and

nonane because there are 9 in the chain.

[mac léinn]

The reason you would start from the bottom and not from the top is because you want to have the lowest # with the first chain from it.

On the Top the first # with a chain would be 3

On the Bottom the first # would be 2

[AddisonLawrence03]

thank you!!! I so understand it now. Thanks for replying everyone