Chlorophyll c

Chlorophyll c is a form of chlorophyll found in certain marine algae, including the photosynthetic Chromista (e.g. diatoms, brown algae) and dinoflagellates.

It has a blue-greenish color and is an accessory pigment, particularly significant in its absorption of light in the 447-452 nm region, Like chlorophyll a and chlorophyll b, it helps the organism gather light and passes a quanta of excitation energy through the light harvesting antennae to the photosynthetic reaction centre. Chlorophyll c is unusual because it has a porphyrin ring structure and does not have an isoprenoid tail or a reduced ring D, features typical of the other chlorophylls commonly found in algae and plants.

Chlorophyll c can be further divided into chlorophyll c₁, chlorophyll c₂ and chlorophyll c₃, plus at least 8 other newly found subtypes.

Chlorophyll c₁

Chlorophyll c₁

Chlorophyll c1 molecule
Names
IUPAC name [(2E)-3-[14-Ethyl-21-(methoxycarbonyl)-4,8,13,18-tetramethyl-20-oxo-9-vinyl-3,4-didehydro-3-phorbinyl-κ2N23,N25]acrylato(2-)]magnesium
Identifiers
ChemSpider	21865345
PubChem	25245630
Properties
Chemical formula	C35H30MgN4O5
Molar mass	610.95 g·mol−1
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Chlorophyll c₁ is a common form of chlorophyll c. It differs from chlorophyll c₂ in its C8 group, having an ethyl group instead of vinyl group (C-C single bond instead of C=C double bond). Its absorption maxima are around 444, 577, 626 nm and 447, 579, 629 nm in diethyl ether and acetone respectively.

Chlorophyll c₂

Chlorophyll c₂

Chlorophyll c2 molecule
Names
IUPAC name [(2E)-3-[21-(Methoxycarbonyl)-4,8,13,18-tetramethyl-20-oxo-9,14-divinyl-3,4-didehydro-3-phorbinyl-κ2N23,N25]acrylato(2-)]magnesium
Identifiers
ChemSpider	21865346
PubChem	25244281
Properties
Chemical formula	C35H28MgN4O5
Molar mass	608.94 g·mol−1
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Chlorophyll c₂ is the most common form of chlorophyll c. Its absorption maxima are around 447, 580, 627 nm and 450, 581, 629 nm in diethyl ether and acetone respectively.

Chlorophyll c₃

Chc₃

Properties
Chemical formula	C36H28MgN4O7
Molar mass	652.95 g·mol−1
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Chlorophyll c₃ is a form of chlorophyll c found in microalga Emiliania huxleyi, identified in 1989. Its absorption maxima are around 452, 585, 625 nm and 452, 585, 627 nm in diethyl ether and acetone respectively.